Merge pi-dr1-dev to aosp-master
am: 6ef53b355d

Change-Id: I65e5a7dc7f606af0dc2c48b0ad3d91581e40fd33
tree: 027f1322a61ef15c2877a39dabf9fbf0a5681791
  1. hal/
  2. legacy/
  3. post_proc/
  4. visualizer/
  5. voice_processing/
  6. Android.mk