midis: Add client tracking boiler plate

Just creates a client object, but doesn't do anything with it (yet).

BUG=chromium:701005
TEST=cros_run_unit_tests --board veyron_minnie --packages "midis"
Change-Id: Ib9d1ef0b80d79543db7cea1c9e5561ad02021482
Reviewed-on: https://chromium-review.googlesource.com/483045
Commit-Ready: Prashant Malani <pmalani@google.com>
Tested-by: Prashant Malani <pmalani@google.com>
Reviewed-by: Chirantan Ekbote <chirantan@chromium.org>
8 files changed