Merge pi-dev-plus-aosp-without-vendor into stage-aosp-master
am: 751bf87ff4

Change-Id: I7dc70a109c1b29dc8b3ef396e2a123054dab1300
tree: 9a42a2f70f50f0b8fd22b22633aa18ed2a1df0fc
  1. hal/
  2. legacy/
  3. post_proc/
  4. visualizer/
  5. voice_processing/
  6. Android.mk