[Quickswitch] animations and gesture recognizer

Recognize Quickswitch gesture i.e. 4F left.

We only accept left swip for now (discussion in bug)

Bug: 382501511
Flag: com.android.systemui.shared.new_touchpad_gestures_tutorial
Test: In following CLs
Change-Id: Ia070d367bfc808a71d849e2afd9451f62883f253