dillon1000/react

Add early return to diffProperties (#28842)

## Summary

This PR adds early return to the `diff` function. We don't need to go
through all the entries of `nextProps`, process and deep-diff the values
if `nextProps` is the same object as `prevProps`. Roughly 6% of all
`diffProperties` calls can be skipped.

## How did you test this change?

RNTester.