Guard against surface manager exceptions

Summary:
It seems there could be a race where a commit is being processed on the JS thread after the surface has been removed from the mounting manager. Since we don't actually need to retrieve the default paddings in these cases, there's no reason we need an enforced read of the SurfaceMountingManager.

## Changelog

[Internal]

Differential Revision: D66369969

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/fabric/FabricUIManager.java

@@ -625,8 +625,8 @@ private long measureMapBuffer(
    * @return if theme data is available in the output parameters.
    */
   public boolean getThemeData(int surfaceId, float[] defaultTextInputPadding) {
-    Context context =
-        mMountingManager.getSurfaceManagerEnforced(surfaceId, "getThemeData").getContext();
+    SurfaceMountingManager surfaceMountingManager = mMountingManager.getSurfaceManager(surfaceId);
+    Context context = surfaceMountingManager != null ? surfaceMountingManager.getContext() : null;
     if (context == null) {
       FLog.w(TAG, "\"themedReactContext\" is null when call \"getThemeData\"");
       return false;