AOD clock and notification animation

Better transitions for pulsing notifications and other keyguard
messages.

Change-Id: I3e3ec844834bf7f5d9ab341f308e78a002248a87
Fixes: 77601057
Fixes: 67641732
Test: visual
Test: atest packages/SystemUI/tests/src/com/android/keyguard/KeyguardSliceViewTest.java
Test: atest packages/SystemUI/tests/src/com/android/systemui/util/wakelock/KeepAwakeAnimationListenerTest.java