t module

-org com.example my_flutter

This creates a some/path/my_flutter/ Flutter module project
with some Dart code to get you started and an .android/
hidden subfolder. The .android folder contains an
Android project that can both help you run a barebones
standalone version of your Flutter module via flutter run
and it’s also a wrapper that helps bootstrap the Flutter
module an embeddable Android library.

Note:
  Add custom Android code to your own existing
  application’s project or a plugin,
  not to the module in .android/.
  Changes made in your module’s .android/
  directory won’t appear in your existing Android
  project using the module.