Play as audio: fix next reopening video player

Flags are not applied to the media in mediaList but to the media from
medialibrary, once out of playIndex, it doesn't have any flags anymore.
When changing media, it triggers a doUpdate in the audio player that
triggers a switchToVideo, if the media can switch to video and doesn't
have the MEDIA_FORCE_AUDIO flag, it switches back to video

This applies time from medialibrary to media from mediaList.

This fixes a regression introduced with
ea39df7b
and follow up 50402c90