N7100: Fix incall BT audio and cleanup

- Fixes incall bluetooth audio (thanks to codeworkx for idea)
- Cleanup audio routing
- Cleanup audio volumes
- Cleanup power_profile to match stock values

Change-Id: I40e8f5df5e892475e73f7eae3e4418824385cc52

Conflicts:
	audio/audio_hw.h
	configs/tiny_hw.xml