Fix force close for Android when non-premium users try to add fees via auto_complete

For stability reasons Sam temporarily turned off the auto_complete API call for non-premium users.  The API was returning a server 'Message' response that wasn't parsable by gson and it threw error which force closed the app.  We can now handle both the expected feed list response and the 'Message' response.  The text within the message will now be shown to the user to provide greater context as to why the request failed.