Delete voicemails when disabling visual voicemail

For privacy reasons we now delete all voicemails and transcriptions when
the user disables visual voicemail, (after confirming that they want to do this
via a dialog).

Note: we only delete voicemails whose source package is the google dialer.
Note: the voicemails will be re-downloaded and re-transcribed if the user re-enables visual voicemail

Bug: 69323147
Test: manual and unit test
PiperOrigin-RevId: 177315139
Change-Id: Ie04496dc5960b485794733fbf74f7f704e806023

1 files changed, 10 insertions, 0 deletions

diff --git a/java/com/android/voicemail/impl/utils/VoicemailDatabaseUtil.java b/java/com/android/voicemail/impl/utils/VoicemailDatabaseUtil.java
index 711d6a8a4..ef5447d32 100644
--- a/java/com/android/voicemail/impl/utils/VoicemailDatabaseUtil.java
+++ b/java/com/android/voicemail/impl/utils/VoicemailDatabaseUtil.java
@@ -57,6 +57,16 @@ public class VoicemailDatabaseUtil {
     return voicemails.size();
   }
 
+  /**
+   * Delete all the voicemails whose source_package field matches this package
+   *
+   * @return the number of voicemails deleted
+   */
+  public static int deleteAll(Context context) {
+    ContentResolver contentResolver = context.getContentResolver();
+    return contentResolver.delete(Voicemails.buildSourceUri(context.getPackageName()), null, null);
+  }
+
   /** Maps structured {@link Voicemail} to {@link ContentValues} in content provider. */
   private static ContentValues getContentValues(Voicemail voicemail) {
     ContentValues contentValues = new ContentValues();