hal: add mixer path for unprocessed devices
am: 0125e7851a

Change-Id: I03568620988d619b64ab08718e2bfea0c9c42a0b
tree: dfaa00cd420ff6f2e616642a3b90e4e5729ab9dd
  1. hal/
  2. legacy/
  3. msm8909/
  4. post_proc/
  5. visualizer/
  6. voice_processing/
  7. Android.mk