You'll find the roomscale VR version in your install directory in a folder called "Desire Den VR 1.05d1" currently all roomscale VR headsets are supported.
The android apk is in a folder called "Desire Villa Demo Android APK"
To install the android demo you will need to activate developer mode on your device which is usually going to your system information in settings and tapping your build number until you see "You are now a developer!"
After that you will want to go to your security settings and check "Allow unknown sources"
You should now be able to install the Desire Villa demo for android!
Enjoy!