legacy/msm7x30: Change default audio sample rate

Return Host PCM interface sample rate based on
AF resampler quality value.

(cherry picked from commit fbaba9b736d0b77c989c80946ffb7d105641c07d)

Conflicts:
	legacy/msm7x30/AudioHardware.cpp
	legacy/msm7x30/AudioHardware.h

Change-Id: I462d121fbc744caba9b855646c2f4377b8357d78