Terminate if server goes down

[tadly]

I currently use the client on a tablet in the bathroom.
Once I'm done and going to bed, I turn of my HTPC and therefore also the snapcast server.
As such, it would be nice if the android client would stop trying to reconnect after some time (a minute sounds reasonable to me) as otherwise I'd imagine the battery would drain a lot more quickly.

This should only apply if Auto connect is not enabled of course.