/etc/xdg/autostart/spice-vdagent.desktop is in spice-vdagent 0.17.0-1ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 | [Desktop Entry]
Name=Spice vdagent
Comment=Agent for Spice guests
Exec=/usr/bin/spice-vdagent
Terminal=false
Type=Application
Categories=
X-GNOME-Autostart-Phase=Initialization
NoDisplay=true
|