Comment 9 for bug 1267570

I've added a task for ofono and powerd, as one of the reasons the modem may be holding a wake-lock, is that we never tell it to go into low-power mode when the screen goes off. The RIL defines a request to notify the radio daemon of changes in screen state. The primary purpose of this request is to throttle events from the radio daemon, however there's conjecture ( per comment #4 ) that this state may also affect the modem wakelock.