audio policy :Added EVRC and QCELP for 7x30 HAL compilation

Change-Id: I46ac52fa5e04edf1d55302f3868427fa35b378d7
audio_policy: Add EVRCB & EVRCWB formats for msm7x27a

Needed to compile audio hal from caf

Change-Id: Ibac3cf0b58de0bb6ee621e0498322318464492a0