Hi, I recently tried to add Push Notifications to my Android Unity game using your new YouTube tutorial and your sample from GitHub (by the way you have a typo in the README - "Deubgger"). I looked into the AndroidManifest.xml file and noticed that it uses quite a lot of permissions. I would like to ask if all of them are really necessarry.
I am not sure if you use GCM or FCM, but according to https://developers.google.com/cloud-messaging/android/android-migrate-fcm you should need some of them. Also I am not sure why you require com.android.vending.BILLING permission.