Remove redundant @TargetApi, @RequiresApi and @SuppressWarnings

Test: Existing tests
PiperOrigin-RevId: 202589482
Change-Id: I6982e4069d30032bf46caf3c9984dfc0e7196f6f

41 files changed, 6 insertions, 113 deletions

diff --git a/java/com/android/dialer/app/calllog/CallLogAsyncTaskUtil.java b/java/com/android/dialer/app/calllog/CallLogAsyncTaskUtil.java
index b306e756a..f54ea79dc 100644
--- a/java/com/android/dialer/app/calllog/CallLogAsyncTaskUtil.java
+++ b/java/com/android/dialer/app/calllog/CallLogAsyncTaskUtil.java
@@ -16,13 +16,11 @@
 
 package com.android.dialer.app.calllog;
 
-import android.annotation.TargetApi;
 import android.content.ContentValues;
 import android.content.Context;
 import android.content.Intent;
 import android.net.Uri;
 import android.os.AsyncTask;
-import android.os.Build.VERSION_CODES;
 import android.provider.CallLog;
 import android.provider.VoicemailContract.Voicemails;
 import android.support.annotation.NonNull;
@@ -35,7 +33,6 @@ import com.android.dialer.util.PermissionsUtil;
 import com.android.voicemail.VoicemailClient;
 
 /** TODO(calderwoodra): documentation */
-@TargetApi(VERSION_CODES.N)
 public class CallLogAsyncTaskUtil {
 
   private static final String TAG = "CallLogAsyncTaskUtil";
diff --git a/java/com/android/dialer/app/calllog/CallLogNotificationsQueryHelper.java b/java/com/android/dialer/app/calllog/CallLogNotificationsQueryHelper.java
index 152a3b837..03b824eb6 100644
--- a/java/com/android/dialer/app/calllog/CallLogNotificationsQueryHelper.java
+++ b/java/com/android/dialer/app/calllog/CallLogNotificationsQueryHelper.java
@@ -17,7 +17,6 @@
 package com.android.dialer.app.calllog;
 
 import android.Manifest;
-import android.annotation.TargetApi;
 import android.content.ContentResolver;
 import android.content.ContentUris;
 import android.content.ContentValues;
@@ -51,7 +50,6 @@ import java.util.List;
 import java.util.concurrent.TimeUnit;
 
 /** Helper class operating on call log notifications. */
-@TargetApi(Build.VERSION_CODES.N)
 public class CallLogNotificationsQueryHelper {
 
   @VisibleForTesting
@@ -349,14 +347,12 @@ public class CallLogNotificationsQueryHelper {
 
     @Override
     @Nullable
-    @TargetApi(Build.VERSION_CODES.N)
     public List<NewCall> query(int type) {
       return query(type, NO_THRESHOLD);
     }
 
     @Override
     @Nullable
-    @TargetApi(Build.VERSION_CODES.N)
     @SuppressWarnings("MissingPermission")
     public List<NewCall> query(int type, long thresholdMillis) {
       if (!PermissionsUtil.hasPermission(context, Manifest.permission.READ_CALL_LOG)) {
diff --git a/java/com/android/dialer/app/voicemail/VoicemailPlaybackPresenter.java b/java/com/android/dialer/app/voicemail/VoicemailPlaybackPresenter.java
index 6fc8d23e3..95662a1f6 100644
--- a/java/com/android/dialer/app/voicemail/VoicemailPlaybackPresenter.java
+++ b/java/com/android/dialer/app/voicemail/VoicemailPlaybackPresenter.java
@@ -16,7 +16,6 @@
 
 package com.android.dialer.app.voicemail;
 
-import android.annotation.TargetApi;
 import android.app.Activity;
 import android.content.ContentResolver;
 import android.content.ContentUris;
@@ -28,7 +27,6 @@ import android.media.AudioManager;
 import android.media.MediaPlayer;
 import android.net.Uri;
 import android.os.AsyncTask;
-import android.os.Build.VERSION_CODES;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.PowerManager;
@@ -90,7 +88,6 @@ import javax.annotation.concurrent.ThreadSafe;
  * calls into this class from outside must be done from the main UI thread.
  */
 @NotThreadSafe
-@TargetApi(VERSION_CODES.N)
 public class VoicemailPlaybackPresenter
     implements MediaPlayer.OnPreparedListener,
         MediaPlayer.OnCompletionListener,
diff --git a/java/com/android/dialer/blocking/BlockedNumbersMigrator.java b/java/com/android/dialer/blocking/BlockedNumbersMigrator.java
index 101a04b2f..ef047a036 100644
--- a/java/com/android/dialer/blocking/BlockedNumbersMigrator.java
+++ b/java/com/android/dialer/blocking/BlockedNumbersMigrator.java
@@ -16,15 +16,12 @@
 
 package com.android.dialer.blocking;
 
-import android.annotation.TargetApi;
 import android.content.ContentResolver;
 import android.content.ContentValues;
 import android.content.Context;
 import android.database.Cursor;
 import android.os.AsyncTask;
-import android.os.Build.VERSION_CODES;
 import android.provider.BlockedNumberContract.BlockedNumbers;
-import android.support.annotation.RequiresApi;
 import com.android.dialer.common.LogUtil;
 import com.android.dialer.database.FilteredNumberContract;
 import com.android.dialer.database.FilteredNumberContract.FilteredNumber;
@@ -35,7 +32,6 @@ import java.util.Objects;
  * Class which should be used to migrate numbers from {@link FilteredNumberContract} blocking to
  * {@link android.provider.BlockedNumberContract} blocking.
  */
-@TargetApi(VERSION_CODES.N)
 @Deprecated
 public class BlockedNumbersMigrator {
 
@@ -49,8 +45,6 @@ public class BlockedNumbersMigrator {
     this.context = Objects.requireNonNull(context);
   }
 
-  @RequiresApi(VERSION_CODES.N)
-  @TargetApi(VERSION_CODES.N)
   private static boolean migrateToNewBlockingInBackground(ContentResolver resolver) {
     try (Cursor cursor =
         resolver.query(
@@ -91,8 +85,6 @@ public class BlockedNumbersMigrator {
     }
   }
 
-  @RequiresApi(VERSION_CODES.N)
-  @TargetApi(VERSION_CODES.N)
   private static boolean isNumberInNewBlocking(ContentResolver resolver, String originalNumber) {
     try (Cursor cursor =
         resolver.query(
@@ -134,7 +126,6 @@ public class BlockedNumbersMigrator {
     void onComplete();
   }
 
-  @TargetApi(VERSION_CODES.N)
   private class MigratorTask extends AsyncTask<Void, Void, Boolean> {
 
     private final Listener listener;
diff --git a/java/com/android/dialer/blocking/FilteredNumberAsyncQueryHandler.java b/java/com/android/dialer/blocking/FilteredNumberAsyncQueryHandler.java
index b41759259..08526ef76 100644
--- a/java/com/android/dialer/blocking/FilteredNumberAsyncQueryHandler.java
+++ b/java/com/android/dialer/blocking/FilteredNumberAsyncQueryHandler.java
@@ -16,7 +16,6 @@
 
 package com.android.dialer.blocking;
 
-import android.annotation.TargetApi;
 import android.content.AsyncQueryHandler;
 import android.content.ContentValues;
 import android.content.Context;
@@ -24,7 +23,6 @@ import android.database.Cursor;
 import android.database.DatabaseUtils;
 import android.database.sqlite.SQLiteDatabaseCorruptException;
 import android.net.Uri;
-import android.os.Build.VERSION_CODES;
 import android.support.annotation.Nullable;
 import android.support.annotation.VisibleForTesting;
 import android.support.v4.os.UserManagerCompat;
@@ -201,7 +199,6 @@ public class FilteredNumberAsyncQueryHandler extends AsyncQueryHandler {
    *
    * @return blocked id.
    */
-  @TargetApi(VERSION_CODES.N)
   @Nullable
   public Integer getBlockedIdSynchronous(@Nullable String number, String countryIso) {
     Assert.isWorkerThread();
diff --git a/java/com/android/dialer/callcomposer/CopyAndResizeImageWorker.java b/java/com/android/dialer/callcomposer/CopyAndResizeImageWorker.java
index 0f1ab5f25..540ef0fe6 100644
--- a/java/com/android/dialer/callcomposer/CopyAndResizeImageWorker.java
+++ b/java/com/android/dialer/callcomposer/CopyAndResizeImageWorker.java
@@ -16,14 +16,12 @@
 
 package com.android.dialer.callcomposer;
 
-import android.annotation.TargetApi;
 import android.content.Context;
 import android.graphics.Bitmap;
 import android.graphics.Bitmap.CompressFormat;
 import android.graphics.BitmapFactory;
 import android.media.ExifInterface;
 import android.net.Uri;
-import android.os.Build.VERSION_CODES;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 import android.support.v4.util.Pair;
@@ -37,7 +35,6 @@ import java.io.InputStream;
 import java.io.OutputStream;
 
 /** Task for copying and resizing images to be shared with RCS process. */
-@TargetApi(VERSION_CODES.N)
 class CopyAndResizeImageWorker implements Worker<Uri, Pair<File, String>> {
   private static final String MIME_TYPE = "image/jpeg";
 
diff --git a/java/com/android/dialer/callcomposer/camera/ImagePersistWorker.java b/java/com/android/dialer/callcomposer/camera/ImagePersistWorker.java
index c18e22d56..27ad06899 100644
--- a/java/com/android/dialer/callcomposer/camera/ImagePersistWorker.java
+++ b/java/com/android/dialer/callcomposer/camera/ImagePersistWorker.java
@@ -16,12 +16,10 @@
 
 package com.android.dialer.callcomposer.camera;
 
-import android.annotation.TargetApi;
 import android.content.Context;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.net.Uri;
-import android.os.Build.VERSION_CODES;
 import android.support.annotation.NonNull;
 import android.support.v4.content.FileProvider;
 import com.android.dialer.callcomposer.camera.ImagePersistWorker.Result;
@@ -38,7 +36,6 @@ import java.io.IOException;
 import java.io.OutputStream;
 
 /** Persisting image routine. */
-@TargetApi(VERSION_CODES.N)
 public class ImagePersistWorker implements Worker<Void, Result> {
   private int width;
   private int height;
diff --git a/java/com/android/dialer/callintent/CallIntent.java b/java/com/android/dialer/callintent/CallIntent.java
index ba61d5619..ef7aff672 100644
--- a/java/com/android/dialer/callintent/CallIntent.java
+++ b/java/com/android/dialer/callintent/CallIntent.java
@@ -198,7 +198,6 @@ public abstract class CallIntent implements Parcelable {
     return intent;
   }
 
-  @SuppressWarnings("AndroidApiChecker") // Use of Java 8 APIs.
   private Bundle createInCallUiIntentExtras() {
     Bundle bundle = new Bundle();
     stringInCallUiIntentExtras().forEach(bundle::putString);
@@ -207,7 +206,6 @@ public abstract class CallIntent implements Parcelable {
     return bundle;
   }
 
-  @SuppressWarnings("AndroidApiChecker") // Use of Java 8 APIs.
   private Bundle createPlaceCallExtras() {
     Bundle bundle = new Bundle();
     stringPlaceCallExtras().forEach(bundle::putString);
@@ -255,7 +253,6 @@ public abstract class CallIntent implements Parcelable {
     return 0;
   }
 
-  @SuppressWarnings("AndroidApiChecker") // Use of Java 8 APIs.
   @Override
   public void writeToParcel(Parcel dest, int flags) {
     dest.writeParcelable(number(), flags);
diff --git a/java/com/android/dialer/calllog/CallLogCacheUpdater.java b/java/com/android/dialer/calllog/CallLogCacheUpdater.java
index b3130e964..008e2ccda 100644
--- a/java/com/android/dialer/calllog/CallLogCacheUpdater.java
+++ b/java/com/android/dialer/calllog/CallLogCacheUpdater.java
@@ -46,7 +46,6 @@ import javax.inject.Inject;
  * Update {@link Calls#CACHED_NAME} and other cached columns after the annotated call log has been
  * updated. Dialer does not read these columns but other apps relies on it.
  */
-@SuppressWarnings("AndroidApiChecker")
 public final class CallLogCacheUpdater {
 
   private final Context appContext;
diff --git a/java/com/android/dialer/calllog/database/AnnotatedCallLogContentProvider.java b/java/com/android/dialer/calllog/database/AnnotatedCallLogContentProvider.java
index 36fa5ff26..ce41a2ab2 100644
--- a/java/com/android/dialer/calllog/database/AnnotatedCallLogContentProvider.java
+++ b/java/com/android/dialer/calllog/database/AnnotatedCallLogContentProvider.java
@@ -16,7 +16,6 @@
 
 package com.android.dialer.calllog.database;
 
-import android.annotation.TargetApi;
 import android.content.ContentProvider;
 import android.content.ContentProviderOperation;
 import android.content.ContentProviderResult;
@@ -28,7 +27,6 @@ import android.database.Cursor;
 import android.database.sqlite.SQLiteDatabase;
 import android.database.sqlite.SQLiteQueryBuilder;
 import android.net.Uri;
-import android.os.Build;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 import com.android.dialer.calllog.database.AnnotatedCallLogConstraints.Operation;
@@ -82,7 +80,6 @@ public class AnnotatedCallLogContentProvider extends ContentProvider {
     return true;
   }
 
-  @TargetApi(Build.VERSION_CODES.N) // Uses try-with-resources
   @Nullable
   @Override
   public Cursor query(
diff --git a/java/com/android/dialer/calllog/datasources/systemcalllog/SystemCallLogDataSource.java b/java/com/android/dialer/calllog/datasources/systemcalllog/SystemCallLogDataSource.java
index 7a12bc4ba..3e123c962 100644
--- a/java/com/android/dialer/calllog/datasources/systemcalllog/SystemCallLogDataSource.java
+++ b/java/com/android/dialer/calllog/datasources/systemcalllog/SystemCallLogDataSource.java
@@ -17,12 +17,10 @@
 package com.android.dialer.calllog.datasources.systemcalllog;
 
 import android.Manifest.permission;
-import android.annotation.TargetApi;
 import android.content.ContentValues;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.database.Cursor;
-import android.os.Build;
 import android.os.Build.VERSION;
 import android.os.Build.VERSION_CODES;
 import android.provider.CallLog;
@@ -230,7 +228,6 @@ public class SystemCallLogDataSource implements CallLogDataSource {
     return null;
   }
 
-  @TargetApi(Build.VERSION_CODES.N) // Uses try-with-resources
   private void handleInsertsAndUpdates(
       Context appContext, CallLogMutations mutations, Set<Long> existingAnnotatedCallLogIds) {
     long previousTimestampProcessed = sharedPreferences.getLong(PREF_LAST_TIMESTAMP_PROCESSED, 0L);
@@ -453,7 +450,6 @@ public class SystemCallLogDataSource implements CallLogDataSource {
     }
   }
 
-  @TargetApi(Build.VERSION_CODES.N) // Uses try-with-resources
   private static Set<Long> getAnnotatedCallLogIds(Context appContext) {
     ArraySet<Long> ids = new ArraySet<>();
 
@@ -482,7 +478,6 @@ public class SystemCallLogDataSource implements CallLogDataSource {
     return ids;
   }
 
-  @TargetApi(Build.VERSION_CODES.N) // Uses try-with-resources
   private static Set<Long> getIdsFromSystemCallLogThatMatch(
       Context appContext, Set<Long> matchingIds) {
     ArraySet<Long> ids = new ArraySet<>();
diff --git a/java/com/android/dialer/calllog/ui/NewCallLogFragment.java b/java/com/android/dialer/calllog/ui/NewCallLogFragment.java
index 5e72a1af3..62f99b6e6 100644
--- a/java/com/android/dialer/calllog/ui/NewCallLogFragment.java
+++ b/java/com/android/dialer/calllog/ui/NewCallLogFragment.java
@@ -293,7 +293,6 @@ public final class NewCallLogFragment extends Fragment implements LoaderCallback
     return new AnnotatedCallLogCursorLoader(Assert.isNotNull(getContext()));
   }
 
-  @SuppressWarnings("AndroidApiChecker") // Use of optional
   @Override
   public void onLoadFinished(Loader<Cursor> loader, Cursor newCursor) {
     LogUtil.enterBlock("NewCallLogFragment.onLoadFinished");
diff --git a/java/com/android/dialer/databasepopulator/BlockedBumberPopulator.java b/java/com/android/dialer/databasepopulator/BlockedBumberPopulator.java
index 378d487e2..0819d52f6 100644
--- a/java/com/android/dialer/databasepopulator/BlockedBumberPopulator.java
+++ b/java/com/android/dialer/databasepopulator/BlockedBumberPopulator.java
@@ -16,12 +16,10 @@
 
 package com.android.dialer.databasepopulator;
 
-import android.annotation.TargetApi;
 import android.content.ContentProviderOperation;
 import android.content.ContentValues;
 import android.content.Context;
 import android.content.OperationApplicationException;
-import android.os.Build.VERSION_CODES;
 import android.os.RemoteException;
 import android.provider.BlockedNumberContract;
 import android.provider.BlockedNumberContract.BlockedNumbers;
@@ -38,7 +36,6 @@ public class BlockedBumberPopulator {
       Arrays.asList(
           createContentValuesWithNumber("123456789"), createContentValuesWithNumber("987654321"));
 
-  @TargetApi(VERSION_CODES.N)
   public static void populateBlockedNumber(@NonNull Context context) {
     ArrayList<ContentProviderOperation> operations = new ArrayList<>();
     for (ContentValues value : values) {
@@ -55,7 +52,6 @@ public class BlockedBumberPopulator {
     }
   }
 
-  @TargetApi(VERSION_CODES.N)
   public static void deleteBlockedNumbers(@NonNull Context context) {
     // clean BlockedNumbers db
     context.getContentResolver().delete(BlockedNumbers.CONTENT_URI, null, null);
diff --git a/java/com/android/dialer/main/impl/OldMainActivityPeer.java b/java/com/android/dialer/main/impl/OldMainActivityPeer.java
index 73bb4f81a..feb76acd7 100644
--- a/java/com/android/dialer/main/impl/OldMainActivityPeer.java
+++ b/java/com/android/dialer/main/impl/OldMainActivityPeer.java
@@ -1371,7 +1371,6 @@ public class OldMainActivityPeer implements MainActivityPeer, FragmentUtilListen
       showPromotionBottomSheet(activity, bottomSheet);
     }
 
-    @SuppressWarnings("AndroidApiChecker") // Use of optional
     private static void showPromotionBottomSheet(Context context, View view) {
       BottomSheetBehavior<View> bottomSheetBehavior = BottomSheetBehavior.from(view);
       Optional<Promotion> promotionOptional =
diff --git a/java/com/android/dialer/oem/CequintCallerIdManager.java b/java/com/android/dialer/oem/CequintCallerIdManager.java
index ea6cbb8cb..da217c883 100644
--- a/java/com/android/dialer/oem/CequintCallerIdManager.java
+++ b/java/com/android/dialer/oem/CequintCallerIdManager.java
@@ -15,12 +15,10 @@
  */
 package com.android.dialer.oem;
 
-import android.annotation.TargetApi;
 import android.content.Context;
 import android.content.pm.PackageManager;
 import android.database.Cursor;
 import android.net.Uri;
-import android.os.Build.VERSION_CODES;
 import android.support.annotation.AnyThread;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
@@ -43,7 +41,6 @@ import java.util.concurrent.ConcurrentHashMap;
  * Cequint Caller ID. It also caches any information fetched in static map, which lives through
  * whole application lifecycle.
  */
-@TargetApi(VERSION_CODES.N)
 public class CequintCallerIdManager {
 
   @VisibleForTesting
diff --git a/java/com/android/dialer/persistentlog/PersistentLogFileHandler.java b/java/com/android/dialer/persistentlog/PersistentLogFileHandler.java
index a6067d368..5f3922265 100644
--- a/java/com/android/dialer/persistentlog/PersistentLogFileHandler.java
+++ b/java/com/android/dialer/persistentlog/PersistentLogFileHandler.java
@@ -16,10 +16,8 @@
 
 package com.android.dialer.persistentlog;
 
-import android.annotation.TargetApi;
 import android.content.Context;
 import android.content.SharedPreferences;
-import android.os.Build.VERSION_CODES;
 import android.preference.PreferenceManager;
 import android.support.annotation.AnyThread;
 import android.support.annotation.MainThread;
@@ -52,8 +50,6 @@ import java.util.List;
  * <p>This class is NOT thread safe. All methods expect the constructor must be called on the same
  * worker thread.
  */
-@SuppressWarnings("AndroidApiChecker") // lambdas
-@TargetApi(VERSION_CODES.N)
 final class PersistentLogFileHandler {
 
   private static final String LOG_DIRECTORY = "persistent_log";
@@ -67,7 +63,7 @@ final class PersistentLogFileHandler {
     public LogCorruptionException(String message) {
       super(message);
     }
-  };
+  }
 
   private File logDirectory;
   private final String subfolder;
diff --git a/java/com/android/dialer/phonelookup/cp2/Cp2DefaultDirectoryPhoneLookup.java b/java/com/android/dialer/phonelookup/cp2/Cp2DefaultDirectoryPhoneLookup.java
index 2e6bcde51..7f2d91a5d 100644
--- a/java/com/android/dialer/phonelookup/cp2/Cp2DefaultDirectoryPhoneLookup.java
+++ b/java/com/android/dialer/phonelookup/cp2/Cp2DefaultDirectoryPhoneLookup.java
@@ -64,7 +64,6 @@ import java.util.function.Predicate;
 import javax.inject.Inject;
 
 /** PhoneLookup implementation for contacts in the default directory. */
-@SuppressWarnings("AndroidApiChecker") // Use of Java 8 APIs.
 public final class Cp2DefaultDirectoryPhoneLookup implements PhoneLookup<Cp2Info> {
 
   private static final String PREF_LAST_TIMESTAMP_PROCESSED =
diff --git a/java/com/android/dialer/phonelookup/cp2/Cp2ExtendedDirectoryPhoneLookup.java b/java/com/android/dialer/phonelookup/cp2/Cp2ExtendedDirectoryPhoneLookup.java
index bbbd18664..237ae5eb0 100644
--- a/java/com/android/dialer/phonelookup/cp2/Cp2ExtendedDirectoryPhoneLookup.java
+++ b/java/com/android/dialer/phonelookup/cp2/Cp2ExtendedDirectoryPhoneLookup.java
@@ -55,7 +55,6 @@ import javax.inject.Inject;
  *
  * <p>Contacts in these directories are accessible only by specifying a directory ID.
  */
-@SuppressWarnings("AndroidApiChecker") // Use of Java 8 APIs.
 public final class Cp2ExtendedDirectoryPhoneLookup implements PhoneLookup<Cp2Info> {
 
   /** Config flag for timeout (in ms). */
diff --git a/java/com/android/dialer/phonelookup/cp2/MissingPermissionsOperations.java b/java/com/android/dialer/phonelookup/cp2/MissingPermissionsOperations.java
index e7776108e..a241368e9 100644
--- a/java/com/android/dialer/phonelookup/cp2/MissingPermissionsOperations.java
+++ b/java/com/android/dialer/phonelookup/cp2/MissingPermissionsOperations.java
@@ -36,7 +36,6 @@ import java.util.function.Predicate;
 import javax.inject.Inject;
 
 /** Shared logic for handling missing permissions in CP2 lookups. */
-@SuppressWarnings("AndroidApiChecker") // Use of Java 8 APIs.
 final class MissingPermissionsOperations {
 
   private final Context appContext;
diff --git a/java/com/android/dialer/phonenumbercache/CallLogQuery.java b/java/com/android/dialer/phonenumbercache/CallLogQuery.java
index 488aa26e5..2f2758a40 100644
--- a/java/com/android/dialer/phonenumbercache/CallLogQuery.java
+++ b/java/com/android/dialer/phonenumbercache/CallLogQuery.java
@@ -53,11 +53,7 @@ public final class CallLogQuery {
   public static final int DATA_USAGE = 21;
   public static final int TRANSCRIPTION = 22;
   public static final int CACHED_PHOTO_URI = 23;
-
-  @RequiresApi(VERSION_CODES.N)
   public static final int POST_DIAL_DIGITS = 24;
-
-  @RequiresApi(VERSION_CODES.N)
   public static final int VIA_NUMBER = 25;
 
   @RequiresApi(VERSION_CODES.O)
diff --git a/java/com/android/dialer/precall/impl/AssistedDialAction.java b/java/com/android/dialer/precall/impl/AssistedDialAction.java
index 40a810b5b..0e38231af 100644
--- a/java/com/android/dialer/precall/impl/AssistedDialAction.java
+++ b/java/com/android/dialer/precall/impl/AssistedDialAction.java
@@ -16,9 +16,7 @@
 
 package com.android.dialer.precall.impl;
 
-import android.annotation.TargetApi;
 import android.content.Context;
-import android.os.Build;
 import android.os.Bundle;
 import android.telecom.PhoneAccount;
 import android.telephony.SubscriptionInfo;
@@ -46,8 +44,6 @@ public class AssistedDialAction implements PreCallAction {
     return false;
   }
 
-  @SuppressWarnings("AndroidApiChecker") // Use of optional
-  @TargetApi(Build.VERSION_CODES.N)
   @Override
   public void runWithoutUi(Context context, CallIntentBuilder builder) {
     if (!builder.isAssistedDialAllowed()) {
@@ -85,8 +81,6 @@ public class AssistedDialAction implements PreCallAction {
   /**
    * A convenience method to return the proper TelephonyManager in possible multi-sim environments.
    */
-  @SuppressWarnings("AndroidApiChecker") // Use of createForSubscriptionId
-  @TargetApi(Build.VERSION_CODES.N)
   private TelephonyManager getAssistedDialingTelephonyManager(
       Context context, CallIntentBuilder builder) {
 
diff --git a/java/com/android/dialer/promotion/PromotionManager.java b/java/com/android/dialer/promotion/PromotionManager.java
index a86a745ad..24830defd 100644
--- a/java/com/android/dialer/promotion/PromotionManager.java
+++ b/java/com/android/dialer/promotion/PromotionManager.java
@@ -49,7 +49,6 @@ public final class PromotionManager {
    *
    * <p>TODO(wangqi): add support for other tabs.
    */
-  @SuppressWarnings("AndroidApiChecker") // Use of optional
   public Optional<Promotion> getHighestPriorityPromotion(@PromotionType int type) {
     for (Promotion promotion : priorityPromotionList) {
       if (promotion.isEligibleToBeShown()) {
diff --git a/java/com/android/dialer/speeddial/SpeedDialAdapter.java b/java/com/android/dialer/speeddial/SpeedDialAdapter.java
index 4a48b6504..1bc072b5b 100644
--- a/java/com/android/dialer/speeddial/SpeedDialAdapter.java
+++ b/java/com/android/dialer/speeddial/SpeedDialAdapter.java
@@ -16,9 +16,7 @@
 
 package com.android.dialer.speeddial;
 
-import android.annotation.TargetApi;
 import android.content.Context;
-import android.os.Build.VERSION_CODES;
 import android.support.annotation.IntDef;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
@@ -57,8 +55,6 @@ import java.util.Map;
  *   <li>Suggested contacts
  * </ol>
  */
-@SuppressWarnings("AndroidApiChecker")
-@TargetApi(VERSION_CODES.N)
 public final class SpeedDialAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>
     implements ItemTouchHelperAdapter {
 
diff --git a/java/com/android/dialer/voicemail/listui/error/VoicemailStatusWorker.java b/java/com/android/dialer/voicemail/listui/error/VoicemailStatusWorker.java
index e87dee3b0..08fef8e47 100644
--- a/java/com/android/dialer/voicemail/listui/error/VoicemailStatusWorker.java
+++ b/java/com/android/dialer/voicemail/listui/error/VoicemailStatusWorker.java
@@ -16,10 +16,8 @@
 
 package com.android.dialer.voicemail.listui.error;
 
-import android.annotation.TargetApi;
 import android.content.Context;
 import android.database.Cursor;
-import android.os.Build.VERSION_CODES;
 import android.provider.VoicemailContract.Status;
 import android.support.annotation.Nullable;
 import com.android.dialer.common.concurrent.DialerExecutor.Worker;
@@ -32,7 +30,6 @@ import java.util.List;
 /**
  * Worker for {@link com.android.dialer.common.concurrent.DialerExecutors} to fetch voicemail status
  */
-@TargetApi(VERSION_CODES.N)
 public class VoicemailStatusWorker implements Worker<Context, List<VoicemailStatus>> {
 
   @Nullable
diff --git a/java/com/android/dialer/voicemailstatus/VoicemailStatusQuery.java b/java/com/android/dialer/voicemailstatus/VoicemailStatusQuery.java
index 8923f7411..7264afee1 100644
--- a/java/com/android/dialer/voicemailstatus/VoicemailStatusQuery.java
+++ b/java/com/android/dialer/voicemailstatus/VoicemailStatusQuery.java
@@ -34,11 +34,7 @@ public class VoicemailStatusQuery {
   public static final int CONFIGURATION_STATE_INDEX = 3;
   public static final int DATA_CHANNEL_STATE_INDEX = 4;
   public static final int NOTIFICATION_CHANNEL_STATE_INDEX = 5;
-
-  @RequiresApi(VERSION_CODES.N)
   public static final int QUOTA_OCCUPIED_INDEX = 6;
-
-  @RequiresApi(VERSION_CODES.N)
   public static final int QUOTA_TOTAL_INDEX = 7;
 
   @RequiresApi(VERSION_CODES.N_MR1)
diff --git a/java/com/android/incallui/CallButtonPresenter.java b/java/com/android/incallui/CallButtonPresenter.java
index 274071a19..be803430b 100644
--- a/java/com/android/incallui/CallButtonPresenter.java
+++ b/java/com/android/incallui/CallButtonPresenter.java
@@ -16,9 +16,7 @@
 
 package com.android.incallui;
 
-import android.annotation.TargetApi;
 import android.content.Context;
-import android.os.Build.VERSION_CODES;
 import android.os.Bundle;
 import android.os.Trace;
 import android.support.v4.app.Fragment;
@@ -445,8 +443,7 @@ public class CallButtonPresenter
    *
    * @param call The active call.
    */
-  @TargetApi(VERSION_CODES.N)
-  @SuppressWarnings(value = {"MissingPermission", "AndroidApiChecker"}) // Java 8 APIs.
+  @SuppressWarnings(value = {"MissingPermission"})
   private void updateButtonsState(DialerCall call) {
     LogUtil.v("CallButtonPresenter.updateButtonsState", "");
     final boolean isVideo = call.isVideoCall();
diff --git a/java/com/android/incallui/CallerInfo.java b/java/com/android/incallui/CallerInfo.java
index 817535f52..3ab3a77d1 100644
--- a/java/com/android/incallui/CallerInfo.java
+++ b/java/com/android/incallui/CallerInfo.java
@@ -21,14 +21,12 @@ import android.database.Cursor;
 import android.graphics.Bitmap;
 import android.graphics.drawable.Drawable;
 import android.net.Uri;
-import android.os.Build.VERSION_CODES;
 import android.provider.ContactsContract;
 import android.provider.ContactsContract.CommonDataKinds.Phone;
 import android.provider.ContactsContract.Contacts;
 import android.provider.ContactsContract.Data;
 import android.provider.ContactsContract.PhoneLookup;
 import android.provider.ContactsContract.RawContacts;
-import android.support.annotation.RequiresApi;
 import android.telephony.PhoneNumberUtils;
 import android.text.TextUtils;
 import com.android.contacts.common.ContactsUtils;
@@ -46,7 +44,6 @@ public class CallerInfo {
 
   private static final String TAG = "CallerInfo";
 
-  @RequiresApi(VERSION_CODES.N)
   private static final String[] DEFAULT_PHONELOOKUP_PROJECTION =
       new String[] {
         PhoneLookup.CONTACT_ID,
diff --git a/java/com/android/incallui/CallerInfoAsyncQuery.java b/java/com/android/incallui/CallerInfoAsyncQuery.java
index 0ac252acf..35011cb67 100644
--- a/java/com/android/incallui/CallerInfoAsyncQuery.java
+++ b/java/com/android/incallui/CallerInfoAsyncQuery.java
@@ -17,14 +17,12 @@
 package com.android.incallui;
 
 import android.Manifest;
-import android.annotation.TargetApi;
 import android.content.AsyncQueryHandler;
 import android.content.ContentResolver;
 import android.content.Context;
 import android.database.Cursor;
 import android.database.SQLException;
 import android.net.Uri;
-import android.os.Build.VERSION_CODES;
 import android.os.Handler;
 import android.os.Looper;
 import android.os.Message;
@@ -51,7 +49,6 @@ import java.util.Arrays;
  *
  * @see CallerInfo
  */
-@TargetApi(VERSION_CODES.N)
 public class CallerInfoAsyncQuery {
 
   /** Interface for a CallerInfoAsyncQueryHandler result return. */
diff --git a/java/com/android/incallui/answer/impl/hint/PawImageLoaderImpl.java b/java/com/android/incallui/answer/impl/hint/PawImageLoaderImpl.java
index aef56872a..6e91307f9 100644
--- a/java/com/android/incallui/answer/impl/hint/PawImageLoaderImpl.java
+++ b/java/com/android/incallui/answer/impl/hint/PawImageLoaderImpl.java
@@ -16,11 +16,9 @@
 
 package com.android.incallui.answer.impl.hint;
 
-import android.annotation.TargetApi;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.graphics.drawable.Drawable;
-import android.os.Build.VERSION_CODES;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 import com.android.dialer.common.Assert;
@@ -29,7 +27,6 @@ import com.android.dialer.storage.StorageComponent;
 import com.android.incallui.answer.impl.hint.PawSecretCodeListener.PawType;
 
 /** Decrypt the event payload to be shown if in a specific time range and the key is received. */
-@TargetApi(VERSION_CODES.N)
 public final class PawImageLoaderImpl implements PawImageLoader {
 
   @Override
diff --git a/java/com/android/incallui/call/DialerCall.java b/java/com/android/incallui/call/DialerCall.java
index 94724e6b2..1f4e49ad8 100644
--- a/java/com/android/incallui/call/DialerCall.java
+++ b/java/com/android/incallui/call/DialerCall.java
@@ -1022,7 +1022,7 @@ public class DialerCall implements VideoTechListener, StateChangedListener, Capa
    * the same time that is logged as the start time in the Call Log (see {@link
    * android.provider.CallLog.Calls#DATE}).
    */
-  @TargetApi(26)
+  @TargetApi(VERSION_CODES.O)
   public long getCreationTimeMillis() {
     return telecomCall.getDetails().getCreationTimeMillis();
   }
diff --git a/java/com/android/incallui/legacyblocking/DeleteBlockedCallTask.java b/java/com/android/incallui/legacyblocking/DeleteBlockedCallTask.java
index f9fe6a68a..309e99405 100644
--- a/java/com/android/incallui/legacyblocking/DeleteBlockedCallTask.java
+++ b/java/com/android/incallui/legacyblocking/DeleteBlockedCallTask.java
@@ -17,12 +17,10 @@
 package com.android.incallui.legacyblocking;
 
 import android.Manifest.permission;
-import android.annotation.TargetApi;
 import android.content.Context;
 import android.content.pm.PackageManager;
 import android.database.Cursor;
 import android.os.AsyncTask;
-import android.os.Build.VERSION_CODES;
 import android.provider.CallLog;
 import android.support.v4.content.ContextCompat;
 import com.android.dialer.common.LogUtil;
@@ -34,7 +32,6 @@ import java.util.Objects;
  * versions of the OS, call blocking is implemented in the system and there's no need to mess with
  * the call log.
  */
-@TargetApi(VERSION_CODES.N)
 public class DeleteBlockedCallTask extends AsyncTask<Void, Void, Long> {
 
   public static final String IDENTIFIER = "DeleteBlockedCallTask";
diff --git a/java/com/android/incallui/spam/SpamCallListListener.java b/java/com/android/incallui/spam/SpamCallListListener.java
index 3b2f1c519..7fd41f971 100644
--- a/java/com/android/incallui/spam/SpamCallListListener.java
+++ b/java/com/android/incallui/spam/SpamCallListListener.java
@@ -16,7 +16,6 @@
 
 package com.android.incallui.spam;
 
-import android.annotation.TargetApi;
 import android.app.Notification;
 import android.app.Notification.Builder;
 import android.app.PendingIntent;
@@ -25,7 +24,6 @@ import android.content.Intent;
 import android.database.Cursor;
 import android.database.sqlite.SQLiteException;
 import android.graphics.drawable.Icon;
-import android.os.Build.VERSION_CODES;
 import android.provider.CallLog;
 import android.provider.CallLog.Calls;
 import android.support.annotation.NonNull;
@@ -88,7 +86,6 @@ public class SpamCallListListener implements CallList.Listener {
   }
 
   /** Checks if the number is in the call history. */
-  @TargetApi(VERSION_CODES.N)
   private static final class NumberInCallHistoryWorker implements Worker<Void, Integer> {
 
     private final Context appContext;
diff --git a/java/com/android/voicemail/impl/CarrierIdentifier.java b/java/com/android/voicemail/impl/CarrierIdentifier.java
index 76576e7ad..7788b7d66 100644
--- a/java/com/android/voicemail/impl/CarrierIdentifier.java
+++ b/java/com/android/voicemail/impl/CarrierIdentifier.java
@@ -28,7 +28,7 @@ import java.util.Optional;
 /** Identifies a carrier. */
 @AutoValue
 @TargetApi(VERSION_CODES.O)
-@SuppressWarnings({"missingpermission", "AndroidApiChecker"})
+@SuppressWarnings({"missingpermission"})
 public abstract class CarrierIdentifier {
 
   public abstract String mccMnc();
diff --git a/java/com/android/voicemail/impl/OmtpVvmCarrierConfigHelper.java b/java/com/android/voicemail/impl/OmtpVvmCarrierConfigHelper.java
index 5185b8fd4..e5263f497 100644
--- a/java/com/android/voicemail/impl/OmtpVvmCarrierConfigHelper.java
+++ b/java/com/android/voicemail/impl/OmtpVvmCarrierConfigHelper.java
@@ -56,7 +56,7 @@ import java.util.Set;
  * <p>TODO(twyen): refactor this to an interface.
  */
 @TargetApi(VERSION_CODES.O)
-@SuppressWarnings({"missingpermission", "AndroidApiChecker"})
+@SuppressWarnings({"missingpermission"})
 public class OmtpVvmCarrierConfigHelper {
 
   private static final String TAG = "OmtpVvmCarrierCfgHlpr";
diff --git a/java/com/android/voicemail/impl/PackageReplacedReceiver.java b/java/com/android/voicemail/impl/PackageReplacedReceiver.java
index 9fa9f75c7..c60fbe722 100644
--- a/java/com/android/voicemail/impl/PackageReplacedReceiver.java
+++ b/java/com/android/voicemail/impl/PackageReplacedReceiver.java
@@ -16,7 +16,6 @@
 
 package com.android.voicemail.impl;
 
-import android.annotation.TargetApi;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
@@ -91,7 +90,6 @@ public class PackageReplacedReceiver extends BroadcastReceiver {
       this.context = context;
     }
 
-    @TargetApi(android.os.Build.VERSION_CODES.N) // used for try with resources
     @Override
     public Void doInBackground(Void arg) throws Throwable {
       LogUtil.i("PackageReplacedReceiver.ExistingVoicemailCheck.doInBackground", "");
diff --git a/java/com/android/voicemail/impl/VvmPackageInstallHandler.java b/java/com/android/voicemail/impl/VvmPackageInstallHandler.java
index 276b7889a..ee8b722de 100644
--- a/java/com/android/voicemail/impl/VvmPackageInstallHandler.java
+++ b/java/com/android/voicemail/impl/VvmPackageInstallHandler.java
@@ -16,7 +16,6 @@
 
 package com.android.voicemail.impl;
 
-import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
 import android.content.Context;
 import android.os.Build.VERSION_CODES;
@@ -34,7 +33,6 @@ import com.android.voicemail.impl.settings.VisualVoicemailSettingsUtil;
  * when a VVM SMS is received instead, as it can be a result of the carrier VVM app trying to run
  * activation.
  */
-@SuppressLint("AndroidApiChecker") // forEach
 @TargetApi(VERSION_CODES.O)
 public final class VvmPackageInstallHandler {
 
diff --git a/java/com/android/voicemail/impl/mail/store/imap/DigestMd5Utils.java b/java/com/android/voicemail/impl/mail/store/imap/DigestMd5Utils.java
index aa2886812..66071609c 100644
--- a/java/com/android/voicemail/impl/mail/store/imap/DigestMd5Utils.java
+++ b/java/com/android/voicemail/impl/mail/store/imap/DigestMd5Utils.java
@@ -32,7 +32,7 @@ import java.security.NoSuchAlgorithmException;
 import java.security.SecureRandom;
 import java.util.Map;
 
-@SuppressWarnings("AndroidApiChecker") // Map.getOrDefault() is java8
+/** Utilities for DIGEST-MD5. */
 @TargetApi(VERSION_CODES.O)
 public class DigestMd5Utils {
 
diff --git a/java/com/android/voicemail/impl/sms/StatusSmsFetcher.java b/java/com/android/voicemail/impl/sms/StatusSmsFetcher.java
index 73e0c7f3c..7ddf64607 100644
--- a/java/com/android/voicemail/impl/sms/StatusSmsFetcher.java
+++ b/java/com/android/voicemail/impl/sms/StatusSmsFetcher.java
@@ -46,7 +46,6 @@ import java.util.concurrent.TimeUnit;
 import java.util.concurrent.TimeoutException;
 
 /** Intercepts a incoming STATUS SMS with a blocking call. */
-@SuppressWarnings("AndroidApiChecker") /* CompletableFuture is java8*/
 @TargetApi(VERSION_CODES.O)
 public class StatusSmsFetcher extends BroadcastReceiver implements Closeable {
 
diff --git a/java/com/android/voicemail/impl/sync/VoicemailsQueryHelper.java b/java/com/android/voicemail/impl/sync/VoicemailsQueryHelper.java
index be11c4453..d0c2ccf47 100644
--- a/java/com/android/voicemail/impl/sync/VoicemailsQueryHelper.java
+++ b/java/com/android/voicemail/impl/sync/VoicemailsQueryHelper.java
@@ -15,14 +15,12 @@
  */
 package com.android.voicemail.impl.sync;
 
-import android.annotation.TargetApi;
 import android.content.ContentResolver;
 import android.content.ContentUris;
 import android.content.ContentValues;
 import android.content.Context;
 import android.database.Cursor;
 import android.net.Uri;
-import android.os.Build.VERSION_CODES;
 import android.provider.VoicemailContract;
 import android.provider.VoicemailContract.Voicemails;
 import android.support.annotation.NonNull;
@@ -256,7 +254,6 @@ public class VoicemailsQueryHelper {
   }
 
   /** Find the oldest voicemails that are on the device, and also on the server. */
-  @TargetApi(VERSION_CODES.N) // used for try with resources
   public List<Voicemail> oldestVoicemailsOnServer(int numVoicemails) {
     if (numVoicemails <= 0) {
       Assert.fail("Query for remote voicemails cannot be <= 0");
diff --git a/java/com/android/voicemail/impl/sync/VvmNetworkRequest.java b/java/com/android/voicemail/impl/sync/VvmNetworkRequest.java
index e7517363c..86d645215 100644
--- a/java/com/android/voicemail/impl/sync/VvmNetworkRequest.java
+++ b/java/com/android/voicemail/impl/sync/VvmNetworkRequest.java
@@ -33,7 +33,6 @@ import java.util.concurrent.Future;
  * Class to retrieve a {@link Network} synchronously. {@link #getNetwork(OmtpVvmCarrierConfigHelper,
  * PhoneAccountHandle)} will block until a suitable network is retrieved or it has failed.
  */
-@SuppressWarnings("AndroidApiChecker") /* CompletableFuture is java8*/
 @TargetApi(VERSION_CODES.O)
 public class VvmNetworkRequest {
 
diff --git a/java/com/android/voicemail/impl/transcribe/TranscriptionUtils.java b/java/com/android/voicemail/impl/transcribe/TranscriptionUtils.java
index d8c00ed91..8611e8022 100644
--- a/java/com/android/voicemail/impl/transcribe/TranscriptionUtils.java
+++ b/java/com/android/voicemail/impl/transcribe/TranscriptionUtils.java
@@ -33,8 +33,6 @@ import java.security.NoSuchAlgorithmException;
 public class TranscriptionUtils {
   static final String AMR_PREFIX = "#!AMR\n";
 
-  // Uses try-with-resource
-  @TargetApi(android.os.Build.VERSION_CODES.N)
   static ByteString getAudioData(Context context, Uri voicemailUri) {
     try (InputStream in = context.getContentResolver().openInputStream(voicemailUri)) {
       return ByteString.readFrom(in);