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This change adds support for SetVmId() call to ConciergeClient, which is
used by ArcVmClientAdapter to set the correct owner id for a mini-ARCVM
instance.

BUG=b:144542975
TEST=Use function from ArcVmClientAdapter, and check that vm_concierge
 receives the call and responds successfully.

Cq-Depend: chromium:2354353
Change-Id: I098b3fa2c1e829b693906a234aae635fa0b3ae80
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2354493Reviewed-by: Yusuke Sato <yusukes@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Commit-Queue: Willie Koomson <wvk@google.com>
Cr-Commit-Position: refs/heads/master@{#812448}