prepare for fix in Object.freeze typing [2/n] (#47131)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/47131

D64152004 fixed a soundness hole in Flow's checking of frozen object types (e.g. try-Flow https://fburl.com/rmct2mf6)

This diff prevents Flow errors from appearing when `experimental.object_freeze_fix` flag is set.

Changelog: [internal]

Reviewed By: SamChou19815

Differential Revision: D64641920

fbshipit-source-id: b6de954d3474f5c4c2e2a58f69cf8cff61be53e5