Did you update your code ?
From google:
// Get tracker.
Tracker t = ((AnalyticsSampleApp) getActivity().getApplication()).getTracker(
TrackerName.APP_TRACKER);
// Enable Display Features.
t.enableAdvertisingIdCollection(true);
I don't know if this is what you're looking for, but hope it helps. From https://support.google.com/analytics/answer/2444872?hl=pt-BR&utm_id=ad