bluedroid: Remove ALSA check on sample rate setting

 * All QC devices using the CodeAurora drivers should be using a 48KHz
   samplerate for A2DP.

Change-Id: I8cec354c5a2dde0f85f19cfee2f75501f2a2d5a3

Conflicts:
	audio_a2dp_hw/Android.mk
	main/Android.mk