Refactor the design and improve the animations of Accessibility Floating Menu(5/n).

Actions of this change:
1) Support the fling & spring effects via dynamic animations.
2) Support that drag the menu anywhere, and then snap to the edge when dropping.

Bug: 227715451
Test: atest MenuAnimationControllerTest
Change-Id: Iebaa99c0d7c57e8d493a8d04ccc88332f4cdb1b7