Add to F-Droid

[licaon-kter]

ref: https://f-droid.org/docs/Inclusion_Policy/

these should be public repos: https://github.com/ProtonWallet/flutter-app/blob/v1.0.0%2B58/.gitmodules eg. point to https://github.com/ProtonWallet/andromeda

exact flutter version should be clear, eg. set flutter as a submodule or have the version listed somewhere

remove the rest of gms lib mentions from code

[zhj4478]

We’ll address this once our hands are free.