KeyguardViewMediator.onScreenTurnedOn is not called if the device is booted into the power-on state. In this case mScreenOn remains false and the lockscreen will always appear after outgoing calls. This fix ensures that onScreenTurnedOn is called when the device is powered up in the on state. Fixes bug 6709173. Change-Id: I7557d8f002307b9125bc53b13bc3cb4c5c9b2758