Allow shelf to overlap UDFPS/lock icon

Port the logic over from NotificationPanelViewController into the
interactors. This allows overlap with UDFPS, or with lock icon and no
ambient indication content present.

Fixes: 315344116
Test: atest SharedNotificationContainerInteractorTest
Flag: ACONFIG com.android.systemui.keyguard_shade_migration_nssl
DEVELOPMENT

Change-Id: I989d92bc81bbb2f2b365f61b03f36184de32db51