Implement SIM swapping

When the call is still ringing, a new button is added to allow to user to call with the other SIM. A background worker will be created to hang up the phone and redial with the other SIM. The in call UI will be prevented from ending during the process.

 Video: https://drive.google.com/a/google.com/file/d/0B2eYBUUznfyTSl9MdXQ0V1ZzQkE/view?usp=sharing

 UX has not been finalized, the icon and position are just placeholder.

Bug: 64215256
Test: SwapSimWorkerTest
PiperOrigin-RevId: 171715715
Change-Id: Idb3f486e9fc9a45d4c5e244af2d7d91b075bf0f2

1 files changed, 23 insertions, 0 deletions

diff --git a/java/com/android/dialer/telecom/TelecomUtil.java b/java/com/android/dialer/telecom/TelecomUtil.java
index 8ff4b3967..3bf9b4666 100644
--- a/java/com/android/dialer/telecom/TelecomUtil.java
+++ b/java/com/android/dialer/telecom/TelecomUtil.java
@@ -17,6 +17,7 @@
 package com.android.dialer.telecom;
 
 import android.Manifest;
+import android.Manifest.permission;
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageManager;
@@ -24,7 +25,9 @@ import android.net.Uri;
 import android.os.Build.VERSION;
 import android.os.Build.VERSION_CODES;
 import android.provider.CallLog.Calls;
+import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
+import android.support.annotation.RequiresPermission;
 import android.support.annotation.VisibleForTesting;
 import android.support.v4.content.ContextCompat;
 import android.telecom.PhoneAccount;
@@ -234,6 +237,26 @@ public abstract class TelecomUtil {
     return instance.isDefaultDialer(context);
   }
 
+  /** @return the other SIM based PhoneAccountHandle that is not {@code currentAccount} */
+  @Nullable
+  @RequiresPermission(permission.READ_PHONE_STATE)
+  @SuppressWarnings("MissingPermission")
+  public static PhoneAccountHandle getOtherAccount(
+      @NonNull Context context, @Nullable PhoneAccountHandle currentAccount) {
+    if (currentAccount == null) {
+      return null;
+    }
+    TelecomManager telecomManager = context.getSystemService(TelecomManager.class);
+    for (PhoneAccountHandle phoneAccountHandle : telecomManager.getCallCapablePhoneAccounts()) {
+      PhoneAccount phoneAccount = telecomManager.getPhoneAccount(phoneAccountHandle);
+      if (phoneAccount.hasCapabilities(PhoneAccount.CAPABILITY_SIM_SUBSCRIPTION)
+          && !phoneAccountHandle.equals(currentAccount)) {
+        return phoneAccountHandle;
+      }
+    }
+    return null;
+  }
+
   /** Contains an implementation for {@link TelecomUtil} methods */
   @VisibleForTesting()
   public static class TelecomUtilImpl {