Do not generate Apple specific files for Android (#50654)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/50654

We realized that when calling
```
npx react-native-community/cli codegen --path . --platform all --outputPath /tmp/codegen
```

We were generating in the android folder some files that are Apple-specific.

With this change, we should stop generating the Apple specific files in Android.

## Changelog
[General][Fixed] - Do not generate Apple specific files for Android

Reviewed By: cortinico

Differential Revision: D72859336

fbshipit-source-id: 443c4dca032e8e68c1da9d829d361d5e0ed007a0