Add a mock vision-common GMS client target

Upcoming GMS versions will split the vision client into vision and
vision-common. In order to roll downstream, we must add an upstream
dependency on vision-common. But upstream is not yet ready to roll, so
we add a mock vision-common target to temporarily satisfy the new
dependency in upstream builds.


Cr-Commit-Position: refs/heads/master@{#473268}
2 files changed