/usr/share/dbus-1/interfaces/ is in xdg-desktop-portal-dev 0.5-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/dbus-1/interfaces/org.freedesktop.impl.portal.Access.xml
/usr/share/dbus-1/interfaces/org.freedesktop.impl.portal.Account.xml
/usr/share/dbus-1/interfaces/org.freedesktop.impl.portal.AppChooser.xml
/usr/share/dbus-1/interfaces/org.freedesktop.impl.portal.FileChooser.xml
/usr/share/dbus-1/interfaces/org.freedesktop.impl.portal.Inhibit.xml
/usr/share/dbus-1/interfaces/org.freedesktop.impl.portal.Notification.xml
/usr/share/dbus-1/interfaces/org.freedesktop.impl.portal.Print.xml
/usr/share/dbus-1/interfaces/org.freedesktop.impl.portal.Request.xml
/usr/share/dbus-1/interfaces/org.freedesktop.impl.portal.Screenshot.xml
/usr/share/dbus-1/interfaces/org.freedesktop.portal.Account.xml
/usr/share/dbus-1/interfaces/org.freedesktop.portal.Device.xml
/usr/share/dbus-1/interfaces/org.freedesktop.portal.FileChooser.xml
/usr/share/dbus-1/interfaces/org.freedesktop.portal.Inhibit.xml
/usr/share/dbus-1/interfaces/org.freedesktop.portal.NetworkMonitor.xml
/usr/share/dbus-1/interfaces/org.freedesktop.portal.Notification.xml
/usr/share/dbus-1/interfaces/org.freedesktop.portal.OpenURI.xml
/usr/share/dbus-1/interfaces/org.freedesktop.portal.Print.xml
/usr/share/dbus-1/interfaces/org.freedesktop.portal.ProxyResolver.xml
/usr/share/dbus-1/interfaces/org.freedesktop.portal.Request.xml
/usr/share/dbus-1/interfaces/org.freedesktop.portal.Screenshot.xml