[FIX] web_editor: properly return the value of _hasICEServers

In the forward port #129226, the return value of _hasICEServers was
not properly returned, which led to the collaboration to always be
disabled.

task-3468261

closes odoo/odoo#132165

X-original-commit: e215290bd2d6091396aafadc58a93a68675d77dd
Signed-off-by: David Monjoie (dmo) <dmo@odoo.com>

addons/web_editor/static/src/js/wysiwyg/wysiwyg.js

@@ -2904,7 +2904,7 @@ export class Wysiwyg extends Component {
 
     _hasICEServers() {
         // Hack: check if mail module is installed.
-        session.notification_type
+        return session.notification_type;
     }
 
     /**