Merge "AudioTrack: Reset position on flush for extended timestamps." into nyc-dev am: aff4e46
am: 9f0fdd1

* commit '9f0fdd1edd70ab31c3b7d9b687afb44e83b868b7':
  AudioTrack: Reset position on flush for extended timestamps.

Change-Id: Id2b09b1cfd21fcf4ec7c9d040f0f199f94e35c7a