Update View-itest.js for pointerEvents box-only unflattening behavior (#55224)

Summary:
Pull Request resolved: #55224

Changelog: [Internal]

D90772188 changed the behavior of views with `pointerEvents="box-only"` to prevent them from being collapsed/flattened. This is intentional because when `important_for_interaction` is applied on a view with `pointerEvents='box-only'`, the view must remain in the hierarchy to correctly signal to the gaze system that its children are not important for interaction.

The test expected the old behavior where `<View pointerEvents="box-only" />` would be collapsed and render `null`. After the C++ change, views with `pointerEvents="box-only"` now always form a stacking context and are not collapsed.

Updated the test to expect the new behavior where `pointerEvents="box-only"` causes views to unflatten, consistent with how `pointerEvents="none"` behaves.

Reviewed By: rubennorte

Differential Revision: D90984297

fbshipit-source-id: 799e4e26b29126386f4fd8183e2ce0b5cb719f9f

Author: fabriziocucci

packages/react-native/Libraries/Components/View/__tests__/View-itest.js

@@ -313,24 +313,16 @@ describe('<View>', () => {
           root.getRenderedOutput({props: ['pointerEvents']}).toJSX(),
         ).toEqual(null);
       });
-      it('box-only propagates to the mounting layer, does not unflatten', () => {
+      it('box-only propagates to the mounting layer, unflattens', () => {
         const root = Fantom.createRoot();
 
-        Fantom.runTask(() => {
-          root.render(<View collapsable={false} pointerEvents="box-only" />);
-        });
-
-        expect(
-          root.getRenderedOutput({props: ['pointerEvents']}).toJSX(),
-        ).toEqual(<rn-view pointerEvents="box-only" />);
-
         Fantom.runTask(() => {
           root.render(<View pointerEvents="box-only" />);
         });
 
         expect(
           root.getRenderedOutput({props: ['pointerEvents']}).toJSX(),
-        ).toEqual(null);
+        ).toEqual(<rn-view pointerEvents="box-only" />);
       });
       it('none propagates to the mounting layer, unflattens', () => {
         const root = Fantom.createRoot();