Animation of Edit mode in scene container

When animating, the header will fade in/out while shrinking vertically
(moving QS container up). The footer will do the opposite movement.

Test: atest QSSceneAdapterImplTest
Test: manual
Fixes: 316602167
Flag: ACONFIG com.android.systemui.scene_container DEVELOPMENT

Change-Id: Ie92df3a43c37bf9c7452f99436606e263120de94