Remove SlimCenter

Change-Id: I650cd2f047e60aa8b56c40e6cbc6454452b6e4a3
Add performance Settings

Change-Id: I3dd08e4ffee384396710935ecd5d92d1571864e6

Conflicts:
	AndroidManifest.xml
	res/values/slim_arrays.xml
	res/values/slim_strings.xml