audio: lower speaker volume slightly

Change-Id: I6b76b1b6fbdbe34c02df681143a9b641e03981da
add support for deep_buffer in audio policy

Change-Id: I21fed541ab8734a87d2e852c7a653a1e5163a4e2
audio cleanup: remove unneeded defines for audio

Change-Id: I814f854d90acc907c393fc75b6dfc62a86b77cee
Merge remote-tracking branch 'cm/cm-11.0' into cm-11.0