Don't call maybeTransitionToOccluded when the bouncer shows.

This should only be called when the bouncer is no longer showing. This causes bugs when we try to open the bouncer while OCCLUDED.

Also, adjust timing since 0.5f is way too long to wait after hiding bouncer.

Bug: 278086361
Flag: com.android.systemui.keyguard_wm_state_refactor
Test: atest SystemUITests
Change-Id: Ifabf2303803daed3221ceb5517cc1a0211609808