Re-implement request body previews on Android (#55456)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/55456

**Context**

Follow-up to D89373824, which addressed a runtime Android crash with `FormData` uploads (https://github.com/facebook/react-native/issues/54881) but introduced a "[Preview unavailable]" fallback for the `ProgressRequestBody` case.

**This diff**

Reintroduce request body previews under this case.

Protects agains the original crash by:

- Checking `body.isOneShot()` to prevent disallowed double-reads of stream bodies.
- [Pre-existing] Preserves `BuildConfig.DEBUG` guard added in D89377163.

Changelog:
[Android][Added] - React Native DevTools: Restore request payload previews on Android

Reviewed By: vzaidman

Differential Revision: D89381124

fbshipit-source-id: ae6ce006285b4bcd7bbb09bb4413d119f18a8630