Connect my plumbing to dsandler's awesome lights out mode.

It took a little bit of refactoring to move the authoritative state
about whether the lights are on or not into the StatusBarManagerService,
so that if the system ui process crashes, the bar comes up in the
right mode.

Change-Id: I95cfaf8f78ca4443ded5262272ea755d44dc5d17
4 files changed