三方应用截图增加uiextension隐私保护能力

Signed-off-by: huangkai <huangkai73@huawei.com>

rosen/modules/render_service/core/drawable/rs_surface_render_node_drawable.cpp

@@ -536,6 +536,7 @@ void RSSurfaceRenderNodeDrawable::OnCapture(Drawing::Canvas& canvas)
         return;
     }
 
+    // HidePrivacyContent is only for UICapture or NoneSystemCalling-WindowCapture
     bool isHiddenScene = canvas.GetUICapture() ||
         (RSUniRenderThread::GetCaptureParam().isSingleSurface_ &&
         !RSUniRenderThread::GetCaptureParam().isSystemCalling_);