Adds encrypted media support from the Decoding Information API. Chrome 66 introduced this API (https://www.chromestatus.com/feature/5869632707624960) to answer the question can this device decode this media? The API additionally notes whether the decoding will be smooth (performant) and/or power efficient. This new feature allows authors to ask the same question for encrypted media.
Docs: https://github.com/WICG/media-capabilities/blob/master/explainer.md#encryption
Samples: https://googlechrome.github.io/samples/media-capabilities/decoding-info-eme