Removing Android makes it nearly worthless for me. Also Apple doesn't have a good track record when it buys companies. The same thing happened with Logic - they immediately dropped Windows. Its rude and anti-competitive.
They already have gone away for Android. On iOS, it looks like they won't allow new apps to be created but existing apps may continue to upload new builds.
I don't see how TF removing Android support has anything to do with them going away. I just this moment created a new TF app for iOS and got a new app token/etc. Where are you seeing this "won't allow new apps to be created"?
It says on that page what happens; they'll stop accepting builds with old SDKs, or if you haven't used the SDK before. It doesn't say at all that they will be closing their service, or not accepting builds at all. Just looks like they are deprecating their SDK.