Add power menu settings & Purity Category

Conflicts:
	res/values/strings.xml
	res/xml/settings_headers.xml

Conflicts:
	res/values/strings.xml
	res/xml/settings_headers.xml
Bring back audio features.
Settings: Add Utility function

Change-Id: Ic5316765d3db48351a9feaa9b3cce286d256071e
DreamSettings : Insert help url

Place correct url for dream help

Change-Id: I637ab3c5dfac24dde3dd30b56ea6529f5feef1c4
Settings : Insert missing help urls

Change-Id: Id43cc744cb4f36cbfa68b0b3fae0b8d4f7927839