* Clean up remote component
* Don't have device be required in send_command service and method.
* Don't have entity_id be required in the base service schema.
* Don't always add activity in the data dict for a service call.
* Update harmony remote platform according to new service schema.
* Remove not needed properties and attributes from the Kira remote
platform.
* Add send_command method to demo platform.
* Add tests and remove duplicate tests.
* Break out required argument as positional argument
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