Merge changes I5d71550f,Iace30af1

* changes:
  Fix platform_get_snd_device_name_extn functions.
  Fix compiler warnings.
tree: aed4ca7f997e06ad9ed4bf75441dfb85e96c93c2
  1. hal/
  2. legacy/
  3. post_proc/
  4. visualizer/
  5. voice_processing/
  6. Android.mk