Update audio for SoundCloud/Definition

Changes to SoundCloud/Definition to be compatible with new internal Audio player + Audio Tile view.

The goal is to not load any audio resources until the intent to play the audio is made (i.e. clicking a play button on the UI). We also only want to instantiate one instance of soundmanager to share across all spices.

**** Requires separate PR on internal repo to be released at the same time.

@russellholt @jagtalon @sdougbrown