/usr/share/app-install/desktop/update-manager:update-manager.desktop is in app-install-data 0.12.04.4.
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 10 11 12 13 14 15 16 | [Desktop Entry]
X-AppInstall-Package=update-manager
X-AppInstall-Popcon=151963
X-AppInstall-Section=main
Name=Update Manager
GenericName=Software Updates
Comment=Show and install available updates
Exec=/usr/bin/update-manager
Icon=system-software-update
Terminal=false
Type=Application
Categories=System;Settings;
X-Ubuntu-Gettext-Domain=app-install-data
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