[iOS] Success/error returning static values

[kyle-ssg]

Probably already know this but uploadImage is currently returning a static response in iOS regardless of success/error.

  NSArray *keys = [NSArray arrayWithObjects:@"result", @"error", nil];
  NSArray *objects = [NSArray arrayWithObjects:@"success", @"", nil];
  NSDictionary *dictionary = [NSDictionary dictionaryWithObjects:objects
                                                         forKeys:keys];
  resolve(dictionary);