A couple of minor things

I just started playing with this module - thanks for putting together and maintaining! I didn't have much luck with the beta version, so I dove into the dev version. It seemed a lot of good work had been put into it, and I do at minimum have a listing of Google Drive items in Drupal now. I ran into two minor issues that seem rather trivial after fixing:

Class 'MediaReadOnlyStreamWrapper' not found - It appears that since this class is involved, the site needs to have the Media module installed. It might be useful to include this as a dependency.

Class 'Google_Service' not found - I found this issue on stackoverflow. To correct, I added this in the droogle_gdrive_connect function, as the first require:

require_once 'Google/autoload.php';

Hope this helps with any future debugging!