Snap the transition progress to target progress when skipping

This CL ensures that we correctly snap the swipe transition progress to
its target progress when skipping the animation entirely. This is
important when dealing with interruptions and multiple transitions are
running at the same time.

Bug: 290930950
Test: atest DraggableHandlerTest
Flag: com.android.systemui.scene_container
Change-Id: I4fed4e3d850ce0db482696fa2bb621235dbef0bf