Solve two SonarCloud smells

app/src/main/java/org/schabi/newpipe/local/subscription/item/FeedGroupAddNewGridItem.kt

@@ -7,6 +7,8 @@ import org.schabi.newpipe.databinding.FeedGroupAddNewGridItemBinding
 
 class FeedGroupAddNewGridItem : BindableItem<FeedGroupAddNewGridItemBinding>() {
     override fun getLayout(): Int = R.layout.feed_group_add_new_grid_item
-    override fun bind(viewBinding: FeedGroupAddNewGridItemBinding, position: Int) {}
     override fun initializeViewBinding(view: View) = FeedGroupAddNewGridItemBinding.bind(view)
+    override fun bind(viewBinding: FeedGroupAddNewGridItemBinding, position: Int) {
+        // this is a static item, nothing to do here
+    }
 }

app/src/main/java/org/schabi/newpipe/local/subscription/item/FeedGroupAddNewItem.kt

@@ -7,6 +7,8 @@ import org.schabi.newpipe.databinding.FeedGroupAddNewItemBinding
 
 class FeedGroupAddNewItem : BindableItem<FeedGroupAddNewItemBinding>() {
     override fun getLayout(): Int = R.layout.feed_group_add_new_item
-    override fun bind(viewBinding: FeedGroupAddNewItemBinding, position: Int) {}
     override fun initializeViewBinding(view: View) = FeedGroupAddNewItemBinding.bind(view)
+    override fun bind(viewBinding: FeedGroupAddNewItemBinding, position: Int) {
+        // this is a static item, nothing to do here
+    }
 }