am 60607a90: Make sure that when the screen is off, we don\'t try to turn the buttons on too.

Merge commit '60607a9012c9b7d39bef8fcf0284772f1b061efc' into gingerbread-plus-aosp

* commit '60607a9012c9b7d39bef8fcf0284772f1b061efc':
  Make sure that when the screen is off, we don't try to turn the buttons on too.