[2/2 Notification Shortcuts by SlimRoms

this will add back slims notification shorcuts feature as well
we add common slim classes we use for navbar navring pie etc
see fb commit for more details

PS2: update Author & message
PS3: again message
PS4: Rebase
PS5: Rebase and change from slim's to existing dslv
PS6: Back to separate dslv since the one we already have doesn't seem to work.

NEED this commit to work -> http://review.pac-rom.com/#/c/449/

Change-Id: I58087df9125ccff490b15cb8e07a95590f8e4eb7
Merge "[2/2 Notification Shortcuts by SlimRoms" into pac-4.4