/usr/share/xsessions/lubuntu-nexus7.desktop is in lubuntu-extra-sessions 0.39.
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]
Name=Lubuntu Nexus7 session
Comment=A specific Lubuntu session optimised for Nexus7
Exec=/usr/bin/lxsession -s Lubuntu-Nexus7 -e LXDE
# Icon=
Type=Application
|