In the Post/Select frames, for audio files:

* Show `artist` and `album` fields in the Attachment Details sidebar
* Sync their values on `change`

See #28839.

Built from https://develop.svn.wordpress.org/trunk@29105


git-svn-id: http://core.svn.wordpress.org/trunk@28891 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Media Grid, for audio files: show Bitrate in the Edit Attachments modal a la the Edit Post screen.

See #28839.

Built from https://develop.svn.wordpress.org/trunk@29106


git-svn-id: http://core.svn.wordpress.org/trunk@28892 1a063a9b-81f0-0310-95a4-ce76da25c4cd