[Fabric] Fix for updating accessibility value in UIA (microsoft#14858)

* Changes for updating accessibilityValue prop

* Change files

Author: vineethkuttan

change/react-native-windows-c4bfd448-6ad1-4e13-a027-b84c8a29a5e4.json

@@ -0,0 +1,7 @@
+{
+  "type": "prerelease",
+  "comment": " Changes for updating accessibilityValue prop in UIA",
+  "packageName": "react-native-windows",
+  "email": "kvineeth@microsoft.com",
+  "dependentChangeType": "patch"
+}

vnext/Microsoft.ReactNative/Fabric/Composition/CompositionViewComponentView.cpp

@@ -801,6 +801,12 @@ void ComponentView::updateAccessibilityProps(
       oldViewProps.accessibilityDescription,
       newViewProps.accessibilityDescription);
 
+  winrt::Microsoft::ReactNative::implementation::UpdateUiaProperty(
+      EnsureUiaProvider(),
+      UIA_ValueValuePropertyId,
+      oldViewProps.accessibilityValue.text,
+      newViewProps.accessibilityValue.text);
+
   if ((oldViewProps.accessibilityState.has_value() && oldViewProps.accessibilityState->selected.has_value()) !=
       ((newViewProps.accessibilityState.has_value() && newViewProps.accessibilityState->selected.has_value()))) {
     auto compProvider =