Migrate to AGP 9

[leo-plonus]

We are trying to migrate our Android app to Android Gradle Plugin v9.
Flutter File Saver is currently not allowing this, because it uses the kotlin-android plugin and not built in kotlin.

Here you can see the Flutter migration guide:
https://docs.flutter.dev/release/breaking-changes/migrate-to-agp-9

[arxdeus]

hello, check for my fork, use main branch as replace

  flutter_file_saver:
    git:
      url: https://github.com/arxdeus/flutter_file_saver.git
      ref: main
      path: packages/flutter_file_saver

[TesteurManiak]

Published in v0.10.0 https://pub.dev/packages/flutter_file_saver/versions/0.10.0