QueueViewController: Initial

This adds a basic play queue handled by the MovieViewController.

Closes #570
3 jobs for !241 with newui__playqueue in 15 minutes and 45 seconds (queued for 17 minutes and 14 seconds)
detached
Status Job ID Name Coverage
  Lint
passed #452699
macos
lint

00:04:10

 
  Build
passed #452700
macos
iOS 12.0

00:11:35

passed #452701
macos
tvOS 12.0

00:07:06