fix: [wc|bw]-created events do not emit an event object (#19465)

* fix: emit real Event instead of empty object in [wc|bw]

* chore: add ability to emit empty events

lib/browser/api/web-contents.js

@@ -413,7 +413,8 @@ WebContents.prototype._init = function () {
     })
   }
 
-  app.emit('web-contents-created', {}, this)
+  const event = process.electronBinding('event').createEmpty()
+  app.emit('web-contents-created', event, this)
 }
 
 // Deprecations