Merge changes from topic "volume-change-flags" into pi-dev

import android.graphics.PixelFormat;

import android.graphics.drawable.Drawable;

import android.media.AudioAttributes;

import android.media.AudioManager;

import android.os.Debug;

import android.os.Handler;

import android.os.IBinder;

  private final ICarVolumeCallback mVolumeChangeCallback = new ICarVolumeCallback.Stub() {

    @Override

    public void onGroupVolumeChanged(int groupId) {

    public void onGroupVolumeChanged(int groupId, int flags) {

      VolumeItem volumeItem = mAvailableVolumeItems.get(groupId);

      int value = getSeekbarValue(mCarAudioManager, groupId);

      // Do not update the progress if it is the same as before. When car audio manager sets its

      if (value != volumeItem.progress) {

        volumeItem.listItem.setProgress(value);

        volumeItem.progress = value;

        if ((flags & AudioManager.FLAG_SHOW_UI) != 0) {

          show(Events.SHOW_REASON_VOLUME_CHANGED);

        }

      }

    }

    @Override

    public void onMasterMuteChanged() {

    public void onMasterMuteChanged(int flags) {

      // ignored

    }

  };