Only apply (AEC) Auto Echo Cancelling once... in post. And use
default stream for mic & voice_call post effects.

Change-Id: I06f8e4e0d71612b673a312803e81e09664f735e2
Use device specific gps.conf files & fall back to gps.conf
if $(TARGET_DEVICE) is missing.

Change-Id: I8c1084eab15997d3bc8832a614a9b7face973500
G2: Cleanup & Fixup init.g2.rc & fstab.g2 mounting & permissions

Change-Id: Icd15f45bddd8d03165113e73cc137f06d58e207f