Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/51464
Add a module of shared examples, like `TextInputSharedExamples`, to avoid copy/paste between these.
Modifies the empty test example a bit and adds an E2E test.
Changelog: [Internal]
Reviewed By: rshest
Differential Revision: D74780847
fbshipit-source-id: 30c2830ef0b638680fe75b4bcf9f138f5c01e190