[Flexiglass] add collapsed layout for UMO and handle transitions

This CL implements the expansion and collapse of UMO during layout
changes. It also handles the QS <-> QQS transition on landscape
orientation.

Flag: com.android.systemui.scene_container
Fixes: 357583707
Test: build. UI checked.
Change-Id: I80717bbdb7ee8983d4afe6c807e1b81946bb0951