There are a few cases where access to FlutterView is currently needed.

1. flutterView.getAccessibilityNodeProvider() in
   https://github.com/flutter/flutter/blob/master/dev/integration_tests/android_semantics_testing/android/app/src/main/java/com/yourcompany/platforminteraction/MainActivity.java#L44

2. Full Flutter view. https://github.com/flutter/flutter/blob/master/dev/integration_tests/android_views/android/app/src/main/java/io/flutter/integration/androidviews/MainActivity.java#L39

These two tests are needed for #33884