Omaha Client is a service that checks for new update with Omaha server.
Omaha Client requires app id and version to run.
The default app id is fuchsia-test:no-update, it can be overridden with --args omaha_app_id='"appid"' appended to your fx set arguments.
The default version for local build is a date string, it needs to be set to a version number in Omaha format, for example: --args build_info_version='"0.0.0.1"'