Bump NDK to 21.4.7075529 (#31731)

Summary:
This PR bumps NDK_VERSION to 21.4.7075529, and patches FileUtil.cpp from folly based on patch from https://github.com/facebook/folly/pull/1593. We can remove the patch once PR lands in Folly and bump Folly version in RN.

FYI, NDK 20 is deprecated and 21 is LTS release.

## Changelog

[Android] [Changed] - Bump NDK to 21.4.7075529

Pull Request resolved: https://github.com/facebook/react-native/pull/31731

Reviewed By: mdvacca

Differential Revision: D29166690

Pulled By: ShikaSD

fbshipit-source-id: 0792691404f718aaf5af1369f66f0cba046b4e20