hal: Add support for external sound devices

Update audio HAL to detect and set the relevant mixer paths for
the sound devices such as speaker, earpiece etc. connected
externally through MI2S backend.

Change-Id: I1e9337a89cb022bce5271b6bde710f633ca2ac29
4 files changed
tree: acd5082eed804aa42563fc47084db360d3c0746d
  1. hal/
  2. legacy/
  3. visualizer/
  4. voice_processing/
  5. Android.mk