Flicker free screen-on from AOD

When pulsing from AOD, we force the display OFF first. This allows
us to transition smoothly from AOD.

Also, we add a scrim transition for whenever we are waking up from
dozing. This relies on I4f3a863709a970f0fc8682c0a0c3547886e1fd0f
which forces the DOZE -> ON transition through OFF first.

Also fixes the WAKE_AND_UNLOCK transition that happens when waking
up with the fingerprint sensor.

Also fix an issue where KeyguardViewMediator's mWakeAndUnlocking
was cleared in onScreenTurnedOff; this should have been added to
the wakefulness lifecycle instead and now that the AOD -> ON transtion
dispatches the screen off callback it broke the fingerprint unlock
transition.

Fixes: 35849781
Fixes: 63887857
Fixes: 63783651
Fixes: 63727166
Test: AOD, receive notification; AOD, unlock with fingerprint; AOD, wake to lockscreen. Verify that everything is flicker-free.
Change-Id: I7d539db80a1c7e9216cf4c5c1e6d314c1893f12d