Update enrollment component to the DIR_METADATA file

This CL is adding the updated monorail component for the enrollment.

BUG=chromium:1157853

Change-Id: Ie6416c626237fbf7c449bff2f6684efcacd6cbdc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2584930
Auto-Submit: Amr Aboelkher <amraboelkher@google.com>
Reviewed-by: Pavol Marko <pmarko@chromium.org>
Commit-Queue: Pavol Marko <pmarko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#837071}

chrome/browser/chromeos/login/enrollment/DIR_METADATA

@@ -7,5 +7,5 @@
 #   https://source.chromium.org/chromium/infra/infra/+/master:go/src/infra/tools/dirmd/proto/dir_metadata.proto
 
 monorail {
-  component: "Enterprise>Enrollment"
+  component: "OS>Software>Enterprise>Enrollment"
 }