Add new test suite "telemetry_unit" for running Telemetry unit tests.

This change does not do anything to cause the new suite to start running.
Running this new suite is pending another issue: http://crbug.com/234843.

BUG=chromium:255213
TEST=Invoked run_remote_tests.sh on a local lumpy device with
"suite:telemetry_unit", then verified that both tests in the suite ran.

Change-Id: I5cb4207a26539cdec99a93bd97514bb467723ce1
Reviewed-on: https://gerrit.chromium.org/gerrit/61604
Reviewed-by: Simran Basi <sbasi@chromium.org>
Commit-Queue: Dennis Jeffrey <dennisjeffrey@chromium.org>
Tested-by: Dennis Jeffrey <dennisjeffrey@chromium.org>
3 files changed