cros: disable two help app OOBE tast tests

Bug: 1131496
Change-Id: If7089f0f68571ab61b47110de9767c8ffd526c8d
Tbr: alemate@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2425393Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#809800}

chromeos/BUILD.gn

@@ -318,6 +318,10 @@ if (is_chromeos_device) {
 
       # crbug.com/1114752
       "arc.ContainerMount",
+
+      # crbug.com/1131496
+      "apps.LaunchHelpApp.clamshell_oobe_stable",
+      "apps.LaunchHelpApp.tablet_oobe_stable",
     ]
   }