add dslv controller

a lot of our settings have drag swipe features
this is the central controller for it to have
easy access

- I'm porting this because i'll probably cherry-pick a lot of features dependant of this class ;)

Change-Id: I9eb9849f2585510649f49c75915b0c7f3c508fdd

Conflicts:
	res/values/attrs.xml
Settings: add development animation transition mode 0.75 and 0.25

Change-Id: Iaaeb3757ef9b3b97d66d929629e9035ab511f72a
notification sc and prep for slim navbar