fa25156a6c
Since fingerprint service can now be started also if a conversation has already began, we can also initialize the proxy asynchronously, without the risk that the service won't be started early enough. As per this, remove the usage of FprintDeviceProxy wrapper completely since it's just not giving us anything here. Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2267>