Optimize flows to reduce jank

After some tracing, multiple flows were being recalculated
on every frame during swipe up/swipe down. Use stateIn
to share this same calculation with downstream flows.

Also, remove the shade collapse fade in callback flow. It
just really isn't needed and could produce a delay in
processing future events.

Bug: 326719188
Test: use perfetto to analyze traces
Flag: ACONFIG com.android.systemui.migrate_clocks_to_blueprint
TEAMFOOD

Change-Id: I1c71776b9cc13e964aea77dd5b7ccd91ea5261f2