Migrated file ReactStylesDiffMap to kotlin (#50616)

Summary:
This PR aims to migrate ReactStylesDiffMap from Java to kotlin as part of https://github.com/facebook/react-native/issues/50513

## Changelog:
[ANDROID][CHANGED]Migrate ReactStylesDiffMap to Kotlin

For more details, see:
https://reactnative.dev/contributing/changelogs-in-pull-requests

Pull Request resolved: https://github.com/facebook/react-native/pull/50616

Test Plan: Tested on RN tester with both new and old arch

Reviewed By: alanleedev

Differential Revision: D72962016

Pulled By: cortinico

fbshipit-source-id: 4de63ab78cd692822c01b5964209000c9d41f595