Don't use AOD device entry icon variant until dozing transition is finished

To avoid a race condition between the light reveal animation
finishing and the device entry icon using its aodVariant (desired
state for pulsing).

Test: atest DeviceEnryForegroundViewModelTest
Fixes: 338131603
Flag: com.android.systemui.device_entry_udfps_refactor
Flag: com.android.systemui.light_reveal_migration
Change-Id: I51f5353119493d2371e1d2cc0563c0ff1bfc6c32