/usr/include/ is in libappstream-dev 0.7.3-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/AppStream/
/usr/include/AppStream/as-provides.h
/usr/include/AppStream/as-metadata.h
/usr/include/AppStream/as-menu-parser.h
/usr/include/AppStream/as-screenshot.h
/usr/include/AppStream/as-component.h
/usr/include/AppStream/as-validator-issue.h
/usr/include/AppStream/as-database.h
/usr/include/AppStream/as-enums.h
/usr/include/AppStream/as-release.h
/usr/include/AppStream/as-search-query.h
/usr/include/AppStream/as-image.h
/usr/include/AppStream/as-category.h
/usr/include/AppStream/as-validator.h
/usr/include/AppStream/as-utils.h
/usr/include/AppStream/appstream.h
/usr/include/AppStream/as-distro-details.h
/usr/include/AppStream/as-data-pool.h