[0.81] fix text input scaling (#16293)

* Fixes misalignment with TextInput on different display scales

* Change files

---------

Co-authored-by: Vineeth <66076509+vineethkuttan@users.noreply.github.com>

Author: SBS-dlucas

change/react-native-windows-93b836bd-dd5f-4524-a53b-cd17b7f9c334.json

@@ -0,0 +1,7 @@
+{
+  "type": "patch",
+  "comment": "Fixes misalignment with TextInput on different display scales",
+  "packageName": "react-native-windows",
+  "email": "dlucas@seabird.com",
+  "dependentChangeType": "patch"
+}

vnext/Microsoft.ReactNative/Fabric/Composition/TextInput/WindowsTextInputComponentView.cpp

@@ -1329,7 +1329,7 @@ void WindowsTextInputComponentView::updateLayoutMetrics(
     facebook::react::LayoutMetrics const &oldLayoutMetrics) noexcept {
   // Set Position & Size Properties
 
-  if ((layoutMetrics.pointScaleFactor != m_layoutMetrics.pointScaleFactor)) {
+  if (m_textServices && layoutMetrics.pointScaleFactor > 0) {
     LRESULT res;
     winrt::check_hresult(m_textServices->TxSendMessage(
         (WM_USER + 328), // EM_SETDPI