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

Change-Id: Ia8744d8d338e019e1d5c8d9a6aa004651e6cf89c
tree: cfc90fd8798fb74e30935cd22577b7d61d47ea9c
  1. hal/
  2. legacy/
  3. msm8909/
  4. post_proc/
  5. visualizer/
  6. voice_processing/
  7. Android.mk