Rx wrapper for AWSMobileClient

Possible implementation for Rx driven projects

Wrapped features

• Configuration is consumed via obsevable of a listener;
• Username/password login;
• Social login(currently for Apple and Facebook);
• Logout;
• Relogin for username/password flow;

Notes

• A configuration consumption and the login action can be executed in async manner;
• Login and a private part request must be synchronized;
• A token obtained via a social provider is managed within the wrapper, because it's expiration time isn't managed inside AWSMobileClient;
• Depends on sibling Shared and Persistent frameworks;

High-level usage