Media: Add support for minified versions of wp-playlist.js, wp-mediaelement.js...

Media: Add support for minified versions of wp-playlist.js, wp-mediaelement.js and wp-mediaelement.css.

Fixes #35984.
Built from https://develop.svn.wordpress.org/trunk@36780


git-svn-id: https://core.svn.wordpress.org/trunk@36747 1a063a9b-81f0-0310-95a4-ce76da25c4cd