flutter-webrtc\android\src\main\java\com\cloudwebrtc\webrtc\FlutterWebRTCPlugin.java:21: error: cannot find symbol
  private final GetUserMediaImpl getUserMediaImpl;
                ^
  symbol:   class GetUserMediaImpl
  location: class FlutterWebRTCPlugin
1 error

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':webrtc:compileDebugJavaWithJavac'.
> Compilation failed; see the compiler error output for details.

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

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

BUILD FAILED in 5s
Finished with error: Gradle build failed: 1