Update for Flutter 3.10 beta (#1746)

## Pre-launch Checklist

- [x] I read the [Flutter Style Guide] _recently_, and have followed its
advice.
- [x] I signed the [CLA].
- [x] I read the [Contributors Guide].
- [x] I updated/added relevant documentation (doc comments with `///`).
- [ ] All existing and new tests are passing.

---------

Co-authored-by: David Iglesias <ditman@gmail.com>
Co-authored-by: Mark Thompson <2554588+MarkTechson@users.noreply.github.com>
Co-authored-by: John Ryan <ryjohn@google.com>

web_embedding/ng-flutter/flutter/lib/pages/counter.dart

@@ -28,7 +28,7 @@ class _CounterDemoState extends State<CounterDemo> {
               'You have pushed the button this many times:',
             ),
             ValueListenableBuilder(
-              valueListenable: widget.counter, 
+              valueListenable: widget.counter,
               builder: (context, value, child) => Text(
                 '$value',
                 style: Theme.of(context).textTheme.headlineMedium,
@@ -38,7 +38,9 @@ class _CounterDemoState extends State<CounterDemo> {
         ),
       ),
       floatingActionButton: FloatingActionButton(
-        onPressed: () { widget.counter.value++; },
+        onPressed: () {
+          widget.counter.value++;
+        },
         tooltip: 'Increment',
         child: const Icon(Icons.add),
       ),