Frameworks: Some fixes, battery drain/massive redraws and minor

This commit fixes the following things:

- massive redraws on qs which causes on use battery drain
- cast fix
- some method changed to final
- code cleanup
- small notificationdrawer background fix
- animation improvement and first to fast qs animation fix

cheers

Change-Id: I234a03b6482a2017985cb17df48118672a062da6