Apply video scaling mode correctly.

Issue: #1428
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=119952373

library/src/main/java/com/google/android/exoplayer/MediaCodecAudioTrackRenderer.java

@@ -254,7 +254,7 @@ public class MediaCodecAudioTrackRenderer extends MediaCodecTrackRenderer implem
   }
 
   @Override
-  protected void onOutputFormatChanged(MediaFormat outputFormat) {
+  protected void onOutputFormatChanged(MediaCodec codec, MediaFormat outputFormat) {
     boolean passthrough = passthroughMediaFormat != null;
     audioTrack.configure(passthrough ? passthroughMediaFormat : outputFormat, passthrough);
   }

library/src/main/java/com/google/android/exoplayer/MediaCodecTrackRenderer.java

@@ -28,7 +28,6 @@ import android.media.MediaCodec;
 import android.media.MediaCodec.CodecException;
 import android.media.MediaCodec.CryptoException;
 import android.media.MediaCrypto;
-import android.media.MediaFormat;
 import android.os.Handler;
 import android.os.SystemClock;
 
@@ -705,10 +704,10 @@ public abstract class MediaCodecTrackRenderer extends TrackRenderer {
    * <p>
    * The default implementation is a no-op.
    *
+   * @param codec The {@link MediaCodec} instance.
    * @param outputFormat The new output format.
-   * @throws ExoPlaybackException If an error occurs on output format change.
    */
-  protected void onOutputFormatChanged(MediaFormat outputFormat) throws ExoPlaybackException {
+  protected void onOutputFormatChanged(MediaCodec codec, android.media.MediaFormat outputFormat) {
     // Do nothing.
   }
 
@@ -849,7 +848,7 @@ public abstract class MediaCodecTrackRenderer extends TrackRenderer {
     if (codecNeedsMonoChannelCountWorkaround) {
       format.setInteger(android.media.MediaFormat.KEY_CHANNEL_COUNT, 1);
     }
-    onOutputFormatChanged(format);
+    onOutputFormatChanged(codec, format);
     codecCounters.outputFormatChangedCount++;
   }
 

library/src/main/java/com/google/android/exoplayer/MediaCodecVideoTrackRenderer.java

@@ -391,7 +391,7 @@ public class MediaCodecVideoTrackRenderer extends MediaCodecTrackRenderer {
   }
 
   @Override
-  protected void onOutputFormatChanged(MediaFormat outputFormat) {
+  protected void onOutputFormatChanged(MediaCodec codec, android.media.MediaFormat outputFormat) {
     boolean hasCrop = outputFormat.containsKey(KEY_CROP_RIGHT)
         && outputFormat.containsKey(KEY_CROP_LEFT) && outputFormat.containsKey(KEY_CROP_BOTTOM)
         && outputFormat.containsKey(KEY_CROP_TOP);
@@ -416,6 +416,8 @@ public class MediaCodecVideoTrackRenderer extends MediaCodecTrackRenderer {
       // On API level 20 and below the decoder does not apply the rotation.
       currentUnappliedRotationDegrees = pendingRotationDegrees;
     }
+    // Must be applied each time the output format changes.
+    codec.setVideoScalingMode(videoScalingMode);
   }
 
   @Override