galaxys2-common: 4.4 Bring Up

One commit to rule to them... includes work from Omni and CM...
without their hardwork, none of this would have been possible.

Includes:

- graphics glitch fixes
- sd card mounting fixes
- TWRP-ification
- SELinux stuff
- Battery level fix

and other stuff I've probably forgotten

Change-Id: Iddb27bfb9be29631adb0b8d835d1fc29aa9e4674