More fixes for keyguard animations.

Add a state machine for calling comeOutOfSleepIfNeededLocked() so
that it is only called after the lockscreen has started dismissing
but not before resumeTopActivityLocked(). Also keep
resumeTopActivityLocked() from being called from
comeOutOfSleepIfNeededLocked() recursively.

Have starting windows count towards notifying the keyguard that a
window has been drawn.

Do not update wallpaper animations based on their not being included
in the windows being animated if there are no windows being animated.

And always improve logging.

Fixes bug 15991916.

Change-Id: I0d21c5337f0e89d9eacc8dab2cdaa52fec43ac0b