Fixing reading shade expansion progress when user pulls from the top of lockscreen

This is special case not covered by shade to lockscreen transition (LockscreenShadeTransitionController) as here shade goes directly to expanded QS and we should use QS expansion fraction to properly track the progress.

Bug: 244574445
Test: Go to large screen portrait lockscreen, pull down from the top, QS status bar should slowly fade in
Change-Id: Ic74fb42e48b2aa3da956c47c41205058175e5273