Android .aab exports?

[pgattic]

First of all, thanks so much to pmgl for this awesome game engine! I love using it!

Being able to export the games as .apk files is useful, but .apk files are no longer accepted in the Google Play developer console for publishing apps. Google now only accepts .aab files. Do you think it would be possible to make that an alternate build option? I imagine it being only a small tweak of the server side code.

Wish I could contribute to this myself but I looked in the repo here, and I can't find any scripts or code for automating the existing .apk build process. But let me know if there's anything I can do to contribute!

[robocoder]

Duplicates #85