/usr/share/app-install/desktop/lxkeymap:lxkeymap.desktop is in app-install-data 15.10.
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 | [Desktop Entry]
X-AppInstall-Package=lxkeymap
X-AppInstall-Popcon=81
X-AppInstall-Section=universe
Name=Lxkeymap
Comment=Lxkeymap application
Categories=Settings;
Exec=lxkeymap
Icon=_usr_share_lxkeymap_media_icon
Terminal=false
Type=Application
X-Ubuntu-Gettext-Domain=app-install-data
|