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This client is needed by downstream (Mountain) repo.

Bug: b/75308868
Change-Id: I06829202017f8244db7787ff0cb3f09b01662032
Reviewed-on: https://chromium-review.googlesource.com/972224Reviewed-by: Wei-Yin Chen (陳威尹) <wychen@chromium.org>
Reviewed-by: David Trainor <dtrainor@chromium.org>
Reviewed-by: Xing Liu <xingliu@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Commit-Queue: Rudy Xie <rudyxie@google.com>
Cr-Commit-Position: refs/heads/master@{#545005}