git: openjdk/jfx-sandbox: metal: Use appropriate layer for setting opacity

[Jayathirth Rao D V]

Changeset: 43cb647b
Branch: metal
Author:    Jayathirth Rao D V <jdv at openjdk.org>
Date:      2025-06-25 15:38:25 +0000
URL:       https://git.openjdk.org/jfx-sandbox/commit/43cb647b2f86545159d77504d8e9e5dd01042803

Use appropriate layer for setting opacity

! modules/javafx.graphics/src/main/native-glass/mac/GlassWindow.m