[Folding to AOD] Do not delay keyguard show when folding

Disables delaying of keyguard show when starting
the folding to AOD animation so keyguard is always
ready when we fold foldable devices.

For unlocked screen off animation this is necessary
to avoid junk as showing keyguard is expensive.
For fold to AOD animation the first frame is black
so junk is not visible, so we can execute this.
This change keeps the unlocked screen off animation
behavior the same and disables delaying keyguard
show for folding to AOD animation.

Bug: 215703534
Test: fold and quickly press power button
 => check that keyguard is visible
Test: fold to AOD and press power button => keyguard visible
Test: lock/unlock using power button
Change-Id: I0a08ffa182e00fff4faf5b7c8218d463ddb5eeaf