Use the display's actual state in the view hierarchy.

Previously, the view hierarchy would suppress drawing whenever the
PowerManager.isScreenOn() method returned false.  However, this method
really describes the interactive state of the device rather than the
actual display state.  This is especially a problem when there are
multiple displays but it also breaks drawing while in doze mode.

This change makes the view hierarchy consider the actual state of the
display instead on an individual basis.

Bug: 13133142
Change-Id: I69870b6b14a3504607a30562aa48c3452f777c1f