After quietly dropping Home Sharing in iOS 8.4 and later tweeting that it would be working to bring it back in iOS 9, it appears that Apple has taken at least a partial step in this direction. iOS 9 beta 4, released earlier today, returns the Home Sharing option under Music in the iOS 9 Settings app, although the feature doesn’t yet appear to yet be implemented in the actual Music app. At this point, it remains unclear exactly how Home Sharing…