Firebase Authentication for Android Credential Manager

[robingenz]

Discussed in #740

^{Originally posted by emmernme October 21, 2024}
Hey! While trying to fix an issue with app switching for authentication, I stumbled upon the deprectation of GoogleSignInOptions and related classes, in favor of the new Credential Manager API (https://developer.android.com/identity/sign-in/credential-manager-siwg).

I'll try to implement this in my project switching fork.

Seems like an easy change: https://stackoverflow.com/a/78488735

[robingenz]

@ebarooni Do you want to look at the issue after the app shortcuts or should I do that?

[ebarooni]

@robingenz I can take it directly after the shortcuts