/etc/xdg/autostart/gnome-software-service.desktop is in gnome-software 3.20.1+git20160420.1.ca63436.ubuntu-xenial-0ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | [Desktop Entry]
Type=Application
Name=GNOME Software
Exec=/usr/bin/gnome-software --gapplication-service
OnlyShowIn=GNOME;Unity;
X-Ubuntu-Gettext-Domain=gnome-software
|