energy_model: only set "ui" runtime parameter  for ChromeOS
energy_model: only set "ui" runtime parameter  for ChromeOS

energy_model instrument generates job specs during the run. One of the
things it does is set "ui" runtime parameter to "off". This parameter
only exists for ChromeOS devices. This commit ensure that the parameter
is not set when running on any other device.

bathepawan/workload-automation,Sticklyman1936/workload-automation,ep1cman/workload-automation,jimboatarm/workload-automation,jimboatarm/workload-automation,ep1cman/workload-automation,Sticklyman1936/workload-automation,ep1cman/workload-automation,Sticklyman1936/workload-automation,bathepawan/workload-automation,bathepawan/workload-automation,jimboatarm/workload-automation,bathepawan/workload-automation,ep1cman/workload-automation,Sticklyman1936/workload-automation,ep1cman/workload-automation,bjackman/workload-automation,bjackman/workload-automation,Sticklyman1936/workload-automation,bjackman/workload-automation,bjackman/workload-automation,Sticklyman1936/workload-automation,jimboatarm/workload-automation,bjackman/workload-automation,jimboatarm/workload-automation,ep1cman/workload-automation,bathepawan/workload-automation,jimboatarm/workload-automation,bathepawan/workload-automation,bjackman/workload-automation