Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/35771
[Changelog][Internal]
Based on the internal discussion, we don't want to report `first-input` event types for RN (just use plain `event` instead), in the way that [Event Timing API standard suggests](https://www.w3.org/TR/event-timing), as this is doesn't have that clear semantics in the context of RN, also to keep it simpler.
Reviewed By: rubennorte
Differential Revision: D42341923
fbshipit-source-id: eff2487dee17ef082604e4c807b4d41485328114