/usr/include/AppStreamQt/ is in libappstreamqt-dev 0.12.0-3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/AppStreamQt/appstreamqt_export.h
/usr/include/AppStreamQt/bundle.h
/usr/include/AppStreamQt/category.h
/usr/include/AppStreamQt/component.h
/usr/include/AppStreamQt/contentrating.h
/usr/include/AppStreamQt/icon.h
/usr/include/AppStreamQt/image.h
/usr/include/AppStreamQt/launchable.h
/usr/include/AppStreamQt/metadata.h
/usr/include/AppStreamQt/pool.h
/usr/include/AppStreamQt/provided.h
/usr/include/AppStreamQt/release.h
/usr/include/AppStreamQt/screenshot.h
/usr/include/AppStreamQt/suggested.h
/usr/include/AppStreamQt/translation.h