audio hal: add support for USB_HEADSET device am: 99dab497f8
am: 6345a8a478

Change-Id: Ie8a80c45e198daea8cab0ce37ebe141d8f8f6ee2
tree: df8ca8ac2e0a45841239beb1235f60f677ab00e1
  1. hal/
  2. legacy/
  3. post_proc/
  4. visualizer/
  5. voice_processing/
  6. Android.mk