Clean up quick settings tile code.

- Fix up coding style
- Add copyright headers
- Fix some multi-user bugs
- Streamline code

Change-Id: I0a118f7154bdd8cfdacdd7fdf8b76241010179de
Use actual storage type of sdcard/usb (1/2).

Change-Id: Icaf0d246ab3bdd0614c8bb7a22f8b2b95cbe9c7e
TODO: Provide drawable for usb storage (someone please).
Merge remote-tracking branch 'cm/cm-11.0' into cm-11.0