Disable badge incrementing for DMs (#4088)

* disable badge increments for dms

* revert decrementing in js for dms

* reset badge on read notifications

* remove some other code

* prevent duplicate notification events

modules/expo-background-notification-handler/android/src/main/java/expo/modules/backgroundnotificationhandler/BackgroundNotificationHandler.kt

@@ -35,5 +35,8 @@ class BackgroundNotificationHandler(
         remoteMessage.data["sound"] = null
       }
     }
+
+    // TODO - Remove this once we have more backend capability
+    remoteMessage.data["badge"] = null
   }
 }