I\'ve just received this message from Google Play but I\'m not collecting the Advertising ID.
Reason for warning: Violation of Usage of Android Advert
If your app uses Firebase SDKs like analytics and all, you can disable Advertising ID collection on SDK level by putting the following line in your AndroidManifest.xml file under the Application tag.
You can read more about it here.
My app was not even an ad supported application but still it got hit by this section 4.8 clause. By employing the above technique I was able to get it back on Google Play without submitting any privacy policy.