Sign-in now creates and stores its session through the
UserSessionManagerProtocol rather than the UserSessionStore, so the
AppCoordinator no longer holds the store.
- The manager forwards clientSessionDelegate and
userSession(for:sessionDirectories:passphrase:) to its store. As with
restoring, the new session isn't registered until the AppCoordinator
adds it.
- AuthenticationService takes the manager, for both sign-in and soft
logout.
- The store mock's configuration moves to the manager mock.
Mauro Romito