ENYO-363: Add info properties to onratechange event.

### Issue
We were previously decorating the `onratechange` event with several playback related properties. These were removed when addressing an issue with shared event object references.

### Fix
We mixin the playback related properties with the bubbled `onratechange` event in both `enyo.Media` and `enyo.Video`, for consistency.

Enyo-DCO-1.1-Signed-off-by: Aaron Tam <aaron.tam@lge.com>