am 2d155d26: PowerManagerService: Fix bug resulting in backlights turning on while screen is off.

Merge commit '2d155d264e5cefc27abf2c5020fcfa06bde755ec' into eclair-mr2

* commit '2d155d264e5cefc27abf2c5020fcfa06bde755ec':
  PowerManagerService: Fix bug resulting in backlights turning on while screen is off.