Request permission on Android 13

Assets/Scripts/Android/AndroidNotificationsPlatform.cs

@@ -2,6 +2,8 @@
 using System;
 using System.Collections;
 using Unity.Notifications.Android;
+using UnityEngine;
+using UnityEngine.Android;
 
 namespace NotificationSamples.Android
 {
@@ -30,8 +32,33 @@ namespace NotificationSamples.Android
 
         public IEnumerator RequestNotificationPermission()
         {
-            var request = new PermissionRequest();
-            while (request.Status == PermissionStatus.RequestPending)
+            const string notificationPermission = "android.permission.POST_NOTIFICATIONS";
+            const int permissionRequiredSDK = 33;
+
+            using (var version = new AndroidJavaClass("android/os/Build$VERSION"))
+            {
+                var deviceSdk = version.GetStatic<int>("SDK_INT");
+                if (deviceSdk < permissionRequiredSDK)
+                    yield break;
+            }
+
+            if (Permission.HasUserAuthorizedPermission(notificationPermission))
+                yield break;
+
+            using (var playerClass = new AndroidJavaClass("com.unity3d.player.UnityPlayer"))
+            {
+                using (var activity = playerClass.GetStatic<AndroidJavaObject>("currentActivity"))
+                {
+                    using (var appInfo = activity.Call<AndroidJavaObject>("getApplicationInfo"))
+                    {
+                        var targetSdk = appInfo.Get<int>("targetSdkVersion");
+                        if (targetSdk < permissionRequiredSDK)
+                            yield break;
+                    }
+                }
+            }
+
+            Permission.RequestUserPermission(notificationPermission);
             yield return null;
         }