Add tracing to quick affordance binder

And also make it injectable and run on the main immediate
dispatcher.

Also remove the shortcuts-besides UDFPS since it is not supported.
Also slightly reduce continuations using stateIn.

Fixes: 358083709
Test: atest KeyguardQuickAffordancesCombinedViewModelTest
Flag: com.android.systemui.migrate_clocks_to_blueprint
Change-Id: Ib7efe31a4427b71b57551cba816dc2ddc3fadf21