Merge tag 'android-10.0.0_r31' into lineage-17.1-android-10.0.0_r31

Android 10.0.0 release 31

* tag 'android-10.0.0_r31':
  audio: free and assign NULL to global static device pointer
  post_proc: release vol listener object based on context
  audio: free and assign NULL to global static device pointer

Change-Id: Ie4f5f97dcba429e6133f8c1c4c6b3538d1a9c8d3
tree: be3429351f41861e0370d7d3c5cd4c7347ad461e
  1. hal/
  2. legacy/
  3. post_proc/
  4. visualizer/
  5. voice_processing/
  6. Android.mk
  7. OWNERS