Add animationController and appearanceController to give better control over badge's animation

[wamynobe]

Connection with issue(s)

#127 Resolve issue #??? #127

Connected to #??? #127

Testing and Review Notes

I am not sure but I ran all current test cases and they all passed. Because this pr will not cause any breaking changes so I think It will be fine 😃

Screenshots or Videos

To Do

• [x] double check the original issue to confirm it is fully satisfied
• [ ] add testing notes and screenshots in PR description to help guide reviewers
• [ ] request the "UX" team perform a design review (if/when applicable)

[wamynobe]

There is a problem that the AnimationController will call dispose() more than once.

[wamynobe]

@yadaniyil Can you take a look on this please?

[wamynobe]

@M-ixai-L Can you take a look on this pls?

[wamynobe]

@M-ixai-L There are some cases that I want the badge to animate even if it did not change the value. In these cases I think animationController.forward will be fine. So getting the animation controller instance from badge class is a simple way to archive that.