In [41746], `wp_get_media_creation_timestamp()` was introduced to read the created timestamp for videos from `getID3` in meta whenever possible. This information is useful separately from the dates on the file itself.
This adds the same support audio files by utilizing `wp_get_media_creation_timestamp()` in `wp_read_audio_metadata()`.
Props blob folio, desrosj.
Fixes#42017.
Built from https://develop.svn.wordpress.org/trunk@44528
git-svn-id: http://core.svn.wordpress.org/trunk@44359 1a063a9b-81f0-0310-95a4-ce76da25c4cd
13c66b1b18