Revert "audio hal: move audio hal to vendor"

This reverts commit 6a2423f1bf493b95315599205dd01bb924fab854.
The original change is not complete!

Bug: 35650034
Test: Play ringtone on Sailfish
1 file changed
tree: ca71e229eef4d6922aa38d0e344e78ca74bea570
  1. hal/
  2. legacy/
  3. post_proc/
  4. visualizer/
  5. voice_processing/
  6. Android.mk