Add useLayoutAnimation

[JoniVR]

Summary

This allows you to use LayoutAnimation in a more convenient hook api. It's mainly useful because it removes the need to explicitly enable it on Android everywhere. If necessary, I can also add a function that allows to manually enable/disable this because it would still end up with an easier to use api.

I've added a default animation to the api, which you can override with the same parameters LayoutAnimation.configureNext uses.

Test Plan

example gif

What's required for testing (prerequisites)?

• The expo snack or an iOS/Android simulator.

What are the steps to reproduce (after prerequisites)?

1. Open the snack link at the bottom of this PR.
2. Use Android or iOS (doesn't work on web afaik).
3. Remove an item and see the animation.

You can optionally also set some of the parameters in animateNext.

Compatibility

OS	Implemented
iOS	✅
Android	✅
Web	❌

Checklist

• [x] I have tested this on a device and a simulator
• [x] I added the documentation in README.md
• [x] I updated the typed files (TS and Flow) --> Couldn't find these?
• [x] I've created a snack to demonstrate the changes: https://snack.expo.io/@jonivr/uselayoutanimation