Merge "init: clarify multiple 'interface' keyword use"

`interface <interface name> <instance name>`

> Associates this service with a list of the HIDL services that it provides. The interface name

  must be a fully-qualified name and not a value name. This is used to allow hwservicemanager to

  lazily start services.

  lazily start services. When multiple interfaces are served, this tag should be used multiple

  times.

  For example: interface vendor.foo.bar@1.0::IBaz default

`ioprio <class> <priority>`