Suppress more error prone warnings that are false positives

Bug: 160794467
Test: TH
Change-Id: I8fd2524c9841d5f7e36d987d762f9bc6c11c4216

core/java/android/app/PendingIntent.java

@@ -397,6 +397,7 @@ public final class PendingIntent implements Parcelable {
      * parameters.  May return null only if {@link #FLAG_NO_CREATE} has been
      * supplied.
      */
+    @SuppressWarnings("AndroidFrameworkPendingIntentMutability")
     public static PendingIntent getActivity(Context context, int requestCode,
             @NonNull Intent intent, @Flags int flags, @Nullable Bundle options) {
         // Some tests only mock Context.getUserId(), so fallback to the id Context.getUser() is null
@@ -528,6 +529,7 @@ public final class PendingIntent implements Parcelable {
      * parameters.  May return null only if {@link #FLAG_NO_CREATE} has been
      * supplied.
      */
+    @SuppressWarnings("AndroidFrameworkPendingIntentMutability")
     public static PendingIntent getActivities(Context context, int requestCode,
             @NonNull Intent[] intents, @Flags int flags, @Nullable Bundle options) {
         // Some tests only mock Context.getUserId(), so fallback to the id Context.getUser() is null