"Add a Flutter Fragment to an Android app" but in Compose

### Page URL

https://docs.flutter.dev/add-to-app/android/add-flutter-fragment/

### Page source

https://github.com/flutter/website/tree/main/src/content/add-to-app/android/add-flutter-fragment.md

### Describe the problem

Please update to also show an implementation with the host activity in Jetpack Compose.

I've tried using `AndroidFragment` composable but it does not expose the `FlutterFragment` instance so I can forward the lifecycle calls (`onPostResume()` etc.) noted on the same page.

### Expected fix

Add an example for importing `FlutterFragment`s in Jetpack Compose

### Additional context

_No response_

### I would like to fix this problem.

- [ ] I will try and fix this problem on docs.flutter.dev.