Hi there, welcome to the community!
But yeah, the deadline is about to pass. Writing any sort of proposal with good odds of acceptance this late without any prior community presence would be
very difficult - just wanting to let you know that in fairness. There are also already 2+ proposals done in that area.
Beyond GSOC you and anybody else would be more than welcome to contribute in general, including in more structured ways like with GSOC-like proposal, any time
To learn more about our server facade, which is an interesting area to work in and pretty much a requirement for any sort of admin app see
https://gianluca-nitti.github.io/GSoC-2017-devlog/
Another interesting angle if you're curious about Android would be helping out with our Destination Sol game, which works on Android. Or rather, it
worked on Android, compatibility hasn't yet been restored since we merged its v2, which is something we could use assistance with. That specifically wouldn't really make a good GSOC item though.