Author: Mihail Geshoski
MDL-61948 core_media: Implement null privacy provider
http://git.moodle.org/gw?p=moodle.git;a=commit;h=1692fae8c0e2553561b2d1d8e212431e71edddf1
http://github.com/moodle/moodle/commit/1692fae8c0e2553561b2d1d8e212431e71edddf1
+ 3.4 en [privacy:metadata,core_media]