Added two states to HD control: HD off - HD on

@valera-rozuvan @polesye Added state tracking to the last video player control that didn't have it, the Quality Control. Acceptance test for its WAI-ARIA features will be written at the same time as for the other controls, in upcoming BLD-386. This PR takes care of issue: https://edx-wiki.atlassian.net/browse/BLD-387