Screenshot shelf (xml version)

Bug: 329659738
Test: manual
Flag: ACONFIG com.android.systemui.screenshot_shelf_ui DEVELOPMENT

Change-Id: I45ede2ebcdcff7e3229028494c319f5aa9189f2e
Merged-In: I45ede2ebcdcff7e3229028494c319f5aa9189f2e
12 files changed