[Fold to AOD animation] part 3: do not collapse notification shade and delay doze display mode

Fixes a few issues with fold to AOD animation:

1) Sometimes when folding a foldable device and showing AOD
we see the underlying app (launcher/wallpaper)
for 1-2 seconds. It happens because the system
sends 'hide system dialogs' broadcast when starting
dreaming which collapses and hides the notification shade.
We need the notification shade in expanded state to show
the scrims and AOD UI. Added ignoring of collapsing when
fold to AOD animation is hapenning.

2) When folding from unlocked state the animation was
playing with reduced FPS (the display was going into
doze mode). Added delay for going into doze mode
when animation is about to happen.

Bug: 202844967
Test: fold/unfold when locked/unlocked
Test: power button screen off from locked/unlocked states
Change-Id: I2af5e4965ef7db234a1931ca442640c96000ec56