ADO-449: fixes undefined variable issue in v1.5.0

Author: priyambad

app/code/Meta/Conversion/Helper/MagentoDataHelper.php

@@ -297,6 +297,10 @@ public function hashValue($string): string
      */
     public function getCartPayload($quote): array
     {
+        $contentCategories = [];
+        $contents = [];
+        $categoryIds = [];
+
         foreach ($quote->getAllItems() as $item) {
             $product = $item->getProduct();
             $categoryIds[] = $product->getCategoryIds();