Merge remote-tracking branch 'goog/stage-aosp-master' into HEAD

Change-Id: I30228733781abf5a42ac43a0a81da11255c2db8c
tree: 923ef1c9d91a2217b25b59370239c6e07ea50758
  1. hal/
  2. legacy/
  3. post_proc/
  4. visualizer/
  5. voice_processing/
  6. Android.mk