Overridden methods of QAbstractVideoSurface subclass do not get called

• Launch attached main.py file
• Output shows that the QMediaPlayer status goes from LoadingMedia to BufferedMedia
• Expected: Calls to overridden methods in QAbstractVideoSurface subclass (present(), start(), etc.)
• Actual: No calls

I have also noticed that typesystem does not have a

<modify-function>

tag for QMediaPlayer for signature

setVideoOutput(QAbstractVideoSurface*)

Re-open: Due to https://codereview.qt-project.org/#/c/247574/