fix: prevent allow notifications prompt on rotation

Author: VougJo23

app/src/main/java/org/schabi/newpipe/util/PermissionHelper.java

@@ -81,12 +81,27 @@ public static boolean checkWriteStoragePermissions(final Activity activity,
         return true;
     }
 
-    public static boolean checkPostNotificationsPermission(final Activity activity,
+        public static boolean checkPostNotificationsPermission(final Activity activity,
                                                            final int requestCode) {
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU
                 && ContextCompat.checkSelfPermission(activity,
                 Manifest.permission.POST_NOTIFICATIONS)
                 != PackageManager.PERMISSION_GRANTED) {
+
+            final int permissionStatus = ContextCompat.checkSelfPermission(activity,
+                    Manifest.permission.POST_NOTIFICATIONS);
+
+            // If permission already granted, return true
+            if (permissionStatus == PackageManager.PERMISSION_GRANTED) {
+                return true;
+            }
+
+            // If user previously denied, don't ask again
+            if (ActivityCompat.shouldShowRequestPermissionRationale(activity,
+                    Manifest.permission.POST_NOTIFICATIONS)) {
+                return false;
+            }
+
             ActivityCompat.requestPermissions(activity,
                     new String[] {Manifest.permission.POST_NOTIFICATIONS}, requestCode);
             return false;