Using success animation from state instead of configuration

For back gesture we need runtime-provided success animation.
Removing success animation from config - it's no longer needed there.

Bug: 369817369
Test: still only refactoring
Flag: com.android.systemui.shared.new_touchpad_gestures_tutorial
Change-Id: Idcb1e10b79a63dbc65f6bf10e8b7581ccf6703d2