Could not resolve all files for configuration ':_internal_aapt2_binary'.

* What went wrong:
Could not resolve all files for configuration ':_internal_aapt2_binary'.
> Could not find com.android.tools.build:aapt2:3.2.1-4818971.
Searched in the following locations:
- file:/Users/lio/Library/Android/sdk/extras/m2repository/com/android/tools/build/aapt2/3.2.1-4818971/aapt2-3.2.1-4818971.pom
- file:/Users/lio/Library/Android/sdk/extras/m2repository/com/android/tools/build/aapt2/3.2.1-4818971/aapt2-3.2.1-4818971-osx.jar
- file:/Users/lio/Library/Android/sdk/extras/google/m2repository/com/android/tools/build/aapt2/3.2.1-4818971/aapt2-3.2.1-4818971.pom
- file:/Users/lio/Library/Android/sdk/extras/google/m2repository/com/android/tools/build/aapt2/3.2.1-4818971/aapt2-3.2.1-4818971-osx.jar
- file:/Users/lio/Library/Android/sdk/extras/android/m2repository/com/android/tools/build/aapt2/3.2.1-4818971/aapt2-3.2.1-4818971.pom
- file:/Users/lio/Library/Android/sdk/extras/android/m2repository/com/android/tools/build/aapt2/3.2.1-4818971/aapt2-3.2.1-4818971-osx.jar
- https://jcenter.bintray.com/com/android/tools/build/aapt2/3.2.1-4818971/aapt2-3.2.1-4818971.pom
- https://jcenter.bintray.com/com/android/tools/build/aapt2/3.2.1-4818971/aapt2-3.2.1-4818971-osx.jar
- http://download.flutter.io/com/android/tools/build/aapt2/3.2.1-4818971/aapt2-3.2.1-4818971.pom
- http://download.flutter.io/com/android/tools/build/aapt2/3.2.1-4818971/aapt2-3.2.1-4818971-osx.jar
Required by:
project :

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 8s

The plugin flutter_webview_plugin could not be built due to the issue above.

首先复现插件构建，并检查 Android SDK 仓库以及 com.android.tools.build:aapt2:3.2.1-4818971 的依赖解析；错误将其列为缺失。完成标准是 flutter_webview_plugin 项目能够在没有未解析的 _internal_aapt2_binary 依赖的情况下构建。

由索引模型根据 Issue 内容生成。