Add android target to experimental examples

[mipastgt]

For completness and for showing the full potential of Compose multiplatform it would be nice to add an android target to both experimental examples (falling-balls-mpp and minesweeper).

[dima-avdeev-jb]

@mipastgt For now we made Android target in this experimental example: https://github.com/JetBrains/compose-jb/tree/master/experimental/examples/chat-mpp

[mipastgt]

I am already trying to apply that to my own project :-)