Cleanup DirectOutputThread::mActiveTrack

Rename activeTrack to mActiveTrack.
Release the reference earlier, at the end of threadLoop_mix().
This allows the field to be made private and to
  move the declaration from PlaybackThread to DirectOutputThread.

Change-Id: I02be7a254638f7d85e92aaf0002d20ca0092a5c3
2 files changed
tree: caa0212392475dcd125d748f2eaf50f11b2b84d8
  1. camera/
  2. cmds/
  3. drm/
  4. include/
  5. media/
  6. services/