This diff:
1. Updates registration methods in `IdentityServiceClientProvider` on `native` to take an FID for registration calls
2. Updates hooks for registration to take FID: `useIdentityPasswordRegister`, `useIdentityWalletRegister`, and `useIdentityWalletRegisterCall`
3. Updates `useRegistrationServerCall` to pull FID from React Navigation params and to:
1. Pass it to identity via the hooks mentioned above
2. Set it in `FIDContext`