/usr/share/dbus-1/services/org.gnome.panel.applet.Apt_WatchApplet_Factory.service is in apt-watch-backend 0.4.0-1ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | [D-BUS Service]
Name=org.gnome.panel.applet.Apt_WatchApplet_Factory
Exec=/usr/lib/apt-watch/apt-watch
|