code: public static synchronized boolean updateAdvertisingIdClientInfo(Context context) {
  		ApptentiveLog.v(ADVERTISER_ID, "Updating advertiser ID client info...");
  		AdvertisingIdClientInfo clientInfo = resolveAdvertisingIdClientInfo(context);
  		if (clientInfo != null && clientInfo.equals(cachedClientInfo)) {
  			return false; // no changes
  		}
  
  		ApptentiveLog.v(ADVERTISER_ID, "Advertiser ID client info changed: %s", clientInfo);
  		cachedClientInfo = clientInfo;
  		notifyClientInfoChanged(cachedClientInfo);
  		return true;
  	}
docs: Returns true if changed