TheAudioDB returns the English album description in the base strDescription
field (no language suffix). The plugin previously only read strDescriptionEN,
which is absent from the API response, so the Overview/Description field
stayed empty for English (and any other language for which no localized
strDescription<LANG> exists). Mirror the fallback already applied to
AudioDbArtistProvider in #16606 and add the missing strDescription property
to the Album DTO.
Fixes#17080
7e3f758bee