If you are running at least version 7.13, you can restrict client versions for Android. Specifying the latest version and earlier would solve the issue but would also block any legitimate use case as well.
It sounds like the issue is systemic. Resolving user behavior with technology is never an ideal scenario but it does make for an interesting puzzle.
As an alternate option, the client information such as Client Type, IP Address, Hostname, etc are stored in the 'HKCU\Volatile Environment Key'. If AD user accounts have restricted logon hours or you know the exact users to target. You could leverage command actions in the horizon agent ADMX or similar mechanism to disconnect them.
Once they connect from a preferred device, hostname, or subnet the auto disconnects would stop.
