820d1dbbde
This optimization avoids recording unnecessary render operations that will not affect the output and also eliminates the need for "draw detection" mechanisms like `DlOpSpy` and `CanvasSpy` by remembering if any non-transparent operations were included. The `DlOpSpy` unit tests were updated to check if the results from that object match the new `DisplayList::affects_transparent_surface()` method. Fixes https://github.com/flutter/flutter/issues/125338 In addition, this change will unblock some other Issues: - https://github.com/flutter/flutter/issues/125318 - https://github.com/flutter/flutter/issues/125403