cheets_CTS/GTS: Enable NotificationRefresh experiment.

This CL temporarily enables the experiment to
sort CTS regressions before we actually launch
the feature.

BUG=b:196460968
TEST=cheets_CTS_R.11_r5.arm.CtsApp

Change-Id: If1b5aaca224b20f0a5b079d28dab8ec8a5b01cbd
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/autotest/+/3244665
Tested-by: Kazuhiro Inaba <kinaba@chromium.org>
Auto-Submit: Kazuhiro Inaba <kinaba@chromium.org>
Reviewed-by: Sara Kato <sarakato@chromium.org>
diff --git a/server/cros/tradefed/tradefed_chromelogin.py b/server/cros/tradefed/tradefed_chromelogin.py
index 4afa6e6..2dc5255 100644
--- a/server/cros/tradefed/tradefed_chromelogin.py
+++ b/server/cros/tradefed/tradefed_chromelogin.py
@@ -64,6 +64,9 @@
         cmd += ' --no-startup-window'
         # Disable several forms of auto-installation to stablize the tests.
         cmd += ' --no-arc-syncs'
+        # TODO(b/196460968) delete after M96 branch, or after finishing the
+        # experiment.
+        cmd += ' --feature=NotificationsRefresh'
         # Toggle the translation from houdini to ndk
         if self._toggle_ndk:
             cmd += ' --toggle_ndk'