Support Android builds

[kennyvv]

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I plan to add support for Android once .NET 6 comes out and monogame is updated to it. I have gotten a build of Alex to run on Android before, however at the time this required many changes to it and libraries it requires.

(Can be seen here: https://twitter.com/WuppDotNet/status/1272310602929766401?s=19)

So for now this os on hold, i will take a look at this once .net 6 is released.

[githubcraft]

Awesome! This is a great new!

[zimzaza4]

.NET 6 is released.

[codingwatching]

How about this support for android? That would be awesome!