Fixed case when user get low refresh rate with VRR capable display. (#475)

To disable VRR support, we create a transparent JPanel with size (1, 1) and add it on top of the SkiaLayer. This causes mixed rendering technologies (java2d and OpenGL/DirectX) to work simultaneously in the same window and VRR cannot be enabled.
see:
https://github.com/JetBrains/compose-jb/issues/1648
https://youtrack.jetbrains.com/issue/TBX-6507#focus=Comments-27-5482439.0-0

skiko/src/awtMain/kotlin/org/jetbrains/skiko/SkiaLayer.awt.kt

@@ -65,6 +65,8 @@ actual open class SkiaLayer internal constructor(
     val canvas: java.awt.Canvas
         get() = backedLayer
 
+    private var vrrDisplayLocker: JPanel? = null
+
     init {
         isOpaque = false
         layout = null
@@ -247,6 +249,14 @@ actual open class SkiaLayer internal constructor(
                 renderApi = fallbackRenderApiQueue.removeAt(0)
                 redrawer?.dispose()
                 redrawer = renderFactory.createRedrawer(this, renderApi, properties)
+                vrrDisplayLocker?.let { remove(it) }
+                if (hostOs == OS.Windows && (renderApi == GraphicsApi.DIRECT3D || renderApi == GraphicsApi.OPENGL)) {
+                    vrrDisplayLocker = JPanel().apply {
+                        background = Color(0, 0, 0, 0)
+                        setBounds(0, 0, 1, 1)
+                    }
+                    add(vrrDisplayLocker, Integer.valueOf(0))
+                }
                 redrawer?.syncSize()
             } catch (e: RenderException) {
                 println(e.message)
@@ -307,6 +317,7 @@ actual open class SkiaLayer internal constructor(
         }
         super.setBounds(x, y, roundedWidth, roundedHeight)
         backedLayer.setSize(roundedWidth, roundedHeight)
+        vrrDisplayLocker?.setBounds(0, 0, 1, 1)
         redrawer?.syncSize()
     }