shell/platform/android/test_runner/src/main/AndroidManifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android">

  <application>

    <activity android:name="io.flutter.embedding.android.FlutterFragmentActivity" />

    <activity android:name="io.flutter.embedding.android.FlutterFragmentActivityTest$FlutterFragmentActivityWithProvidedEngine" />

  </application>

</manifest>