Broadcast intent action used to query available content rating systems.
The TV input manager service locates available content rating systems by querying broadcast receivers that are registered for this action. An application can offer additional content rating systems to the user by declaring a suitable broadcast receiver in its manifest.
Here is an example broadcast receiver declaration that an application might include in its AndroidManifest.xml to advertise custom content rating systems. The meta-data specifies a resource that contains a description of each content rating system that is provided by the application. In the above example, the @xml/tv_content_rating_systems resource refers to an XML resource whose root element is <rating-system-definitions> that contains zero or more <rating-system-definition> elements. Each <rating-system-definition> element specifies the ratings, sub-ratings and rating orders of a particular content rating system.