[bc25] Ensure SceneContainer remains visible on Gone when shade is open.

This includes ensuring SceneContainer receives user interactions when
the shade is open on the Gone scene.

Bug: 356596436
Flag: com.android.systemui.scene_container
Flag: com.android.systemui.dual_shade
Test: Manually tested by expanding and collapsing the both shades over
 the gone scene.
Change-Id: I3f5fe589d0c8931e3c42948c406cb36a001f7808