Merge cherrypicks of [9739504, 9739044, 9739045, 9739614] into qt-qpr1-c-release

Change-Id: Idd5694d3b896a6ed04621a831acf7abecc5336e7
tree: 56cb73a9204bdf3bd3019b7d5d0eb43ea89f6ce6
  1. hal/
  2. legacy/
  3. post_proc/
  4. visualizer/
  5. voice_processing/
  6. Android.mk
  7. OWNERS