Could not get unknown property 'android' for project ':flutter_webview_plugin' of type org.gradle.api.Project.

I'm trying to use the Flutter Webview Plugin but I keep getting the error described in the title and I don't know why. I added `flutter_webview_plugin: ^0.3.5` to my `dependencies` in the `pubspec.yaml` and did `$ flutter pub get`. Do I need to add anything else or maybe something to the `build.gradle` like `implementation...` or something like that? Can you help me please?

Start with the dependency entry in pubspec.yaml and the Android build.gradle configuration mentioned in the report. Run flutter pub get and reproduce the reported Gradle error to identify which project configuration is missing or incompatible. Done means the plugin can be fetched and the Android project builds without the unknown-property error.

Written by the indexing model from the issue text.