Settings: Add SlimRoms notification shortcuts and classes (1/2)

This will add slims notification shorcuts feature as well
we add common slim classes and dslv controller. See fb
commit for more details.

Conflicts:
	res/values/attrs.xml
	res/values/slim_arrays.xml
	res/values/slim_strings.xml
	res/xml/appgroup_list.xml

Change-Id: Ic9c615959d390360d398e23080a3957d35e25e16