You can just install the Flutter and Dart plugin in the android studio by following these steps:
- Start the Android Studio application
- Open plugin preferences (Preferences>Plugins on macOS, File>Settings>Plugins on Windows & Linux).
- Select Marketplaceā¦, search the Flutter plugin, and click install.
- Click Yes when prompted to install the Dart plugin.
- Click on Apply and OK.
- Click "Restart" on the popup.
The below image indicates where you should do it
