see: - https://github.com/flutter/engine/blob/220ece4d9faac1a48a3fa28ada315303f3fdec10/shell/platform/android/platform_view_android.cc#L54 - https://github.com/flutter/engine/blob/220ece4d9faac1a48a3fa28ada315303f3fdec10/shell/platform/android/platform_view_android.cc#L81