Conditional compilation for 48KHz sample rate

Change-Id: I901e83dac9e18343dad4fad9c6ebf5f58c24ebf5

Conflicts:
	audio_a2dp_hw/audio_a2dp_hw.h
	btif/co/bta_av_co.c
	btif/src/btif_media_task.c
5 files changed