add support for deep_buffer in audio policy

Change-Id: I91f85c50b0f741459349c217fcb099ec69138a83
audio cleanup: remove unneeded defines for audio

Change-Id: If8fd9fbd37b6cf02cfdd75122a928eb595fde1e0
Merge remote-tracking branch 'cm/cm-11.0' into cm-11.0