hammerhead: Make audio not suck anymore.

 * Add support for additional low-power offload modes
 * Enable gapless playback support
 * Enable 24-bit playback
 * Enable the compander for increased dynamic range on headphones
   and speaker output

Change-Id: If8cae7e940ba753d8b155017b15239bb49616b72
Merge commit '9d7d8ff2ed4d0a08453b7eeac557cfaeedbea28e' into cm-11.0-work

Conflicts:
	mixer_paths.xml