Add to F-Droid

[moffatman]

Will need to set up a relatively clean build script. Right now blocked as some android dependencies don't build in current flutter/master without some patches.

[moffatman]

Blocked for the time being as non-free code is used for push notifications

[Linuks777]

Blocked for the time being as non-free code is used for push notifications

@moffatman If you have the time, you could look into using Unified Push for notifications instead of Firebase, this would solve the issue.

[moffatman]

@Linuks777 Didn't know about Unified Push, it seems like a cool project. I don't think I will switch to using it, but I think I can copy their approach to getting the necessary firebase token without any proprietary libs.