audio HAL: separate platform specific code

Separate platform specific code from generic audio HAL code.
Platform specific code is:
- platform initialization
- pcm device selection
- pcm stream configuration
- sound device selection
- acdb ID selection
- HDMI configuration

Change-Id: Iaf327943fa8674aad0c22a71e7cbf4288a138c7d

Conflicts:
	hal/audio_hw.c
	hal/audio_hw.h
9 files changed
tree: 8fa2ddeba4de80d7f23e60ae71711e9f604f9ad8
  1. hal/
  2. legacy/
  3. voice_processing/
  4. Android.mk