Automatically create and boot Android emulators

[mattleibow]

Testing with iOS is so nice in that it creates a custom simulator and boots it up.

It would be awesome if we could get the same for Android.

[mattleibow]

Just some links to what the v3 of my script is doing: xamarin/Xamarin.Forms#13641

I am making a few assumptions, but these values can all be read from either the APK or the APP files. Hopefully we see this soon, as this makes the scripts a bit yuck.

[mattleibow]

Just linking some code that I did a while back on basically doing all this. Might have been a bit over-engineered, but still did the job: https://github.com/mattleibow/dotnet-devices