Remove no-op Immediately communal transition key

This transition key currently does nothing and just results in a
default animation. snapToScene should be used instead.

Bug: 363239820
Flag: com.android.systemui.communal_hub
Test: atest FromDozingTransitionInteractorTest
Change-Id: I6fa1ce1059217cf0c5ef787e079301011fb17683
5 files changed