Same as the previous diff, but for native instead of web. Copying description from there:
We want to prevent siweAuthActionTypes.success from directly setting dataLoaded, so that in the new registration flow on native we can defer LoggedOutModal and RegistrationNavigator from being dismissed until after the avatar server call completes.
Instead of having siweAuthActionTypes.success directly set dataLoaded, we'll use this new action instead. A later diff will update reduceDataLoaded so that siweAuthActionTypes.success no longer affects it.
Depends on D8108