Restrict access to release branches for LTS Refresh.

BUG=b/529917915

Change-Id: I01be5fb11fdada53ddcf09191d638b7aed0c3394
Reviewed-on: https://cos-review.googlesource.com/c/All-Projects/+/166246
Tested-by: Derek Taylor <ddtaylor@google.com>
Reviewed-by: Angel Adetula <angeladetula@google.com>
1 file changed