Density changer

ported from SlimRoms; credits to kufikugel

Change-Id: Icc85653ddd81fb1cc6e2b8ad6629332cf0a0fbc7
Signed-off-by: Scott <scott@ubuntu>

Conflicts:
	AndroidManifest.xml
	res/values/arrays.xml
	res/values/strings.xml
	res/xml/interface_settings.xml

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