layout: Use FastTransform for hit testing (#38554)

`FastTransform` provides faster matrix operations when the involved
transforms are just translations.

Testing: Not needed (no change in behavior)

Signed-off-by: Oriol Brufau <obrufau@igalia.com>
Co-authored-by: Martin Robinson <mrobinson@igalia.com>

components/layout/display_list/mod.rs

@@ -272,7 +272,7 @@ impl DisplayListBuilder<'_> {
                         info.origin,
                         *parent_spatial_node_id,
                         info.transform_style,
-                        PropertyBinding::Value(info.transform),
+                        PropertyBinding::Value(*info.transform.to_transform()),
                         info.kind,
                         spatial_tree_item_key,
                     );