Add a controller to only call download_url() or download_video() if account has subscription

by @arsaboo
Looks like Ring is blocking the camera component when there is no cloud subscription. In such cases, the Ring camera component shows Image not available. It will nice if the Ring camera can check for subscription and only load if there is a subscription. If there is no subscription, it should just log an error or create a notification.

Mentioned: home-assistant/core#10736