Switch screenshot dismissal to a spring animation.

Fade out when animation begins.

Bug: 412986001
Test: Manual test on small and large screens.
Flag: com.android.systemui.screenshot_dismissal_spring
Change-Id: If9559f45710431b18ed6fd101df90d88641b5993

Change-Id: Ib7a00bde37b74c9517c2cb3a0c01c766e57757e6