/usr/share/dbus-1/interfaces/ is in libakonadi-dev 1.7.2-0ubuntu1.1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/dbus-1/interfaces/org.freedesktop.Akonadi.Agent.Control.xml
/usr/share/dbus-1/interfaces/org.freedesktop.Akonadi.Agent.Status.xml
/usr/share/dbus-1/interfaces/org.freedesktop.Akonadi.AgentManager.xml
/usr/share/dbus-1/interfaces/org.freedesktop.Akonadi.ControlManager.xml
/usr/share/dbus-1/interfaces/org.freedesktop.Akonadi.DebugInterface.xml
/usr/share/dbus-1/interfaces/org.freedesktop.Akonadi.NotificationManager.xml
/usr/share/dbus-1/interfaces/org.freedesktop.Akonadi.NotificationSource.xml
/usr/share/dbus-1/interfaces/org.freedesktop.Akonadi.Preprocessor.xml
/usr/share/dbus-1/interfaces/org.freedesktop.Akonadi.Resource.xml
/usr/share/dbus-1/interfaces/org.freedesktop.Akonadi.Server.xml
/usr/share/dbus-1/interfaces/org.freedesktop.Akonadi.Tracer.xml
/usr/share/dbus-1/interfaces/org.freedesktop.Akonadi.TracerNotification.xml