Display blanking logic improvements

Blank display immediatelly when requested, display power controller
will fade out the screen using ColorFade.

SysUI just needs to fade the UI back in when we're in control of
the transition again.

Change-Id: I9d58de3d39c0288f5c82c0c04c86cb43bb3d02c4
Fixes: 72527083
Test: receive notification on AOD, wait.
Test: receive notification on AOD, fp unlock
Test: wake up, unlock, pull notification shade
Test: atest packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/ScrimControllerTest.java
Bug: 71913808