This diff introduces useUnlinkFID which is a hook that returns a callback that calls the unlinkFarcasterAccount identity rpc and then clears the fid from the synced metadata client store
Linear task: https://linear.app/comm/issue/ENG-7412/call-unlink-farcaster-rpc-on-the-client
Depends on D11863
We definitely should return something from this lambda since otherwise it is useless to assign it to variable.
If we find that we don't have permissions then just calling await this.requestAndroidNotificationsPermission(); would result in a prompt asking for notifications permissions. However if the user grants those permissions then hasPermissions is still falsy (since promise returned nothing), so deviceToken will be set to null. Nevertheless permissions are actually granted byt the OS, so the state on the device and keyserver would heal itself on next render.
This differential fixes this case so that if user grants permissions correct state is achieved immediately without need for additional re-render to heal the state.