prevent desktopCaturer from running unless visualizer explicitly requested (#1931)

src/preload/visualizer.ts

@@ -0,0 +1,11 @@
+import { ipcRenderer } from 'electron';
+
+const setLocalSurfaceVisible = (visible: boolean) => {
+    ipcRenderer.send('visualizer-set-local-surface-visible', visible);
+};
+
+export const visualizer = {
+    setLocalSurfaceVisible,
+};
+
+export type VisualizerApi = typeof visualizer;