[3/3] AudioFX: Add center frequency param to bassboost

Change-Id: I49da8e5ab24502d0de5c09b7fc9f4b8a51bead60
[3/3] AudioEffect: Add a stereo widener effect

Change-Id: Iab2035c5601394b060e7e77e85ad85aca6e4c89f
[1/3] Base: Audio Themes Support

Conflicts:
	media/java/android/media/AudioService.java

Fw/av: http://gerrit.dirtyunicorns.com/#/c/2149/
Settings: http://gerrit.dirtyunicorns.com/#/c/2156/

Change-Id: Id80dc7f0bcbd39b5305d6ea0fb8bd9fa516f3634

Conflicts:
	core/java/android/provider/Settings.java
	media/java/android/media/AudioService.java