Add virtual flag that indicates QS UI in compose

This should be used outside of (NPVC) and scene container classes to
determine if the new QS UI should be used. This is true if either
com.android.systemui.qs_ui_refactor_compose_fragment OR
com.android.systemui.dual_shade are enabled.

Flag: com.android.systemui.qs_ui_refactor_compose_fragment
Flag: com.android.systemui.dual_shade
Bug: 329270606
Test: manual, check brightness slider
Change-Id: I0197e1a13f200fab6f516149eeb65a3ad9005eb2