audio: hal: add customized external smart pa code
am: 13f26e89c5

Change-Id: Ic306b8270a904781be965cc52a9b6d31f66e94a9
tree: 5afa33ebcacf9ae2da86c17226420683745dede2
  1. hal/
  2. legacy/
  3. post_proc/
  4. visualizer/
  5. voice_processing/
  6. Android.mk