Center ribbons

Change-Id: Ic4fc00a3a1f9f67c8e0b6c632a7b87a7734d1a75
Status Bar Auto Unhide on Notification When in Fullscreen

- Automatically unhide the status bar when in fullscreen to show new
notification tickers and rehide again after the ticker is done

PS2:
Fix whitespace

PS3:
- Hide status bar in lights out or after ticker is halted
- Use better method for status bar state signaling instead of intent
broadcast

[log]

Change-Id: Ifc53b09133fdd78278dae0524e584f7db65e8c24