Merge "[Flexiglass] Fix split shade layout and transitions" into main

.../systemui/common/ui/compose/windowinsets/DisplayCutout.kt

...m/android/systemui/qs/ui/composable/QuickSettingsScene.kt

...systemui/scene/ui/composable/SceneContainerTransitions.kt

.../composable/transitions/FromGoneToSplitShadeTransition.kt

...c/com/android/systemui/shade/ui/composable/ShadeHeader.kt

...rc/com/android/systemui/shade/ui/composable/ShadeScene.kt

...oid/systemui/scene/ui/viewmodel/GoneSceneViewModelTest.kt

...id/systemui/shade/ui/viewmodel/ShadeSceneViewModelTest.kt

...com/android/systemui/scene/shared/model/TransitionKeys.kt

...droid/systemui/scene/ui/view/SceneWindowRootViewBinder.kt

...android/systemui/scene/ui/viewmodel/GoneSceneViewModel.kt

...ndroid/systemui/shade/ui/viewmodel/ShadeSceneViewModel.kt

...bar/notification/stack/NotificationStackScrollLayout.java