/usr/share/dbus-1/services/ is in gnome-applets-data 3.4.1-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/dbus-1/services/org.gnome.panel.applet.AccessxStatusAppletFactory.service
/usr/share/dbus-1/services/org.gnome.panel.applet.CPUFreqAppletFactory.service
/usr/share/dbus-1/services/org.gnome.panel.applet.CharpickerAppletFactory.service
/usr/share/dbus-1/services/org.gnome.panel.applet.DriveMountAppletFactory.service
/usr/share/dbus-1/services/org.gnome.panel.applet.GWeatherAppletFactory.service
/usr/share/dbus-1/services/org.gnome.panel.applet.GeyesAppletFactory.service
/usr/share/dbus-1/services/org.gnome.panel.applet.InvestAppletFactory.service
/usr/share/dbus-1/services/org.gnome.panel.applet.MultiLoadAppletFactory.service
/usr/share/dbus-1/services/org.gnome.panel.applet.NullAppletFactory.service
/usr/share/dbus-1/services/org.gnome.panel.applet.StickyNotesAppletFactory.service
/usr/share/dbus-1/services/org.gnome.panel.applet.TrashAppletFactory.service