Establish the prototyping playground for infra

Starting by moving the client/client_profile protos over since this is
an ongoing wip and tugs on many issues that still need to be vetted.

This prototyping sandbox will be used in conjuction with sample/fake
config payloads to aid in the understanding/defining solid boundaries.

Change-Id: I700b928c17131fb0fbe481a7f2ac92ba21b93163
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/2352628
Tested-by: C Shapiro <shapiroc@chromium.org>
Auto-Submit: C Shapiro <shapiroc@chromium.org>
Reviewed-by: Ned Nguyen <nednguyen@google.com>
Reviewed-by: Jason Kusuma <jkusuma@google.com>
Reviewed-by: Mike Nichols <mikenichols@chromium.org>
Commit-Queue: Ned Nguyen <nednguyen@google.com>
14 files changed