/usr/share/applications/ubuntu-app-test.desktop is in ubuntu-app-test 0.12+17.04.20170404.2-0ubuntu6.
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 | [Desktop Entry]
Name=Ubuntu App Test
Comment=A shell used to test applications
Exec=qmlscene /usr/share/ubuntu-app-launch/ubuntu-app-test.qml
Type=Application
Terminal=false
Icon=ubuntu-app-test
X-Ayatana-Appmenu-Show-Stubs=false
X-Ubuntu-Touch=true
X-Ubuntu-Single-Instance=true
|