Add Promise.withResolvers polyfill for older WebViews (Chrome < 119)

index.html

@@ -16,6 +16,19 @@
     <script>
       window.global = window;
     </script>
+    <!-- Polyfill for Chrome < 119 (Huawei WebView, etc.) -->
+    <script>
+      if (!Promise.withResolvers) {
+        Promise.withResolvers = function () {
+          var resolve, reject;
+          var promise = new Promise(function (a, b) {
+            resolve = a;
+            reject = b;
+          });
+          return { promise: promise, resolve: resolve, reject: reject };
+        };
+      }
+    </script>
 
     <% if (packageType === "full") { %>
     <!-- Open graph meta tags -->