Manually merge changes from giant AOSP topic

Change-Id: I6570f8e55cbba95308cc3d0fbea4bae11d5b85df
tree: fd146afd973bb5cb42e338cfd48db691e4092c87
  1. hal/
  2. legacy/
  3. post_proc/
  4. visualizer/
  5. voice_processing/
  6. Android.mk