[scrap] Only restrict the admin UI.
[scrap] Only restrict the admin UI.

Bug: skia:11108
Change-Id: Ic177052d106b9c77aa3cb4feda9fd59708378bf9
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/348789
Auto-Submit: Joe Gregorio <b9cf2471ff6d33504cafe8e6f356b732b2cadced@google.com>
Commit-Queue: Kevin Lubick <7cdab2cfab351f23814786ba39716e90eed69047@google.com>
Reviewed-by: Kevin Lubick <7cdab2cfab351f23814786ba39716e90eed69047@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot