Frameworks: Lockscreen custom shortcuts and 8 targets (1/2)

Normal phones need a bit more love on Lockscreen.

This commit adds

- the ability to add additional shortcuts on lockscreen. (so you can use 5 targets + 6 shortcuts)
- Ability to open shortcut only with longpress
- Ability to use 8 targets on all phones (8 targets / shortcuts disabled)
- fix cutoff lockscreenring
- some minor fixes
- only for phones at the moment. Tablets have already 8 targets
- shares png's with Notification shortcut feature
  this commit needs: https://review.slimroms.net:8443/#/c/1949/

Patchsets:
- cleanup

- move png's into extra commit to share with our new notification shortcut feature

cheers

Change-Id: Ie85945003de21a9cfdecdf7a5bb6f9aaec80f0b7