[3/3] Settings: Audio Themes Settings

Conflicts:
	res/xml/sound_settings.xml

Fw/b: http://gerrit.dirtyunicorns.com/#/c/2148/
Fw/av: http://gerrit.dirtyunicorns.com/#/c/2149/

Change-Id: I8aad04a642441b91617943e6941841aec859396d

Conflicts:
	res/values/strings_custom.xml
	res/xml/sound_settings.xml