Enable swipe to dismiss gesture on glanceable hub.

This changelist brings back the original swipe to dismiss behavior. The
animation values for blur have also been adjusted to better match the
transitional state of the drag behavior.

Test: atest GlanceableHubToLockscreenTransitionViewModelTest
Flag: EXEMPT restoring existing behavior
Fixes: 393365531
Change-Id: I802029844d2d6b1e7610d26e723743a9df3829fc