Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/44823
Changelog: [internal]
This modifies the example for `IntersectionObserver` in RNTester to test that the API reports changes in intersection also coming from changes in layout (previously is was only from changes in scroll position).
Reviewed By: javache
Differential Revision: D58260057
fbshipit-source-id: 305d5996148730d718da30896f6cc62991b717f7