More fixes for non-ASCII chars in MPD uris

[kingosticks]

I missed Album URIs in #1805. And a changelog entry.

[codecov]

Codecov Report

Merging #1808 into release-2.3 will increase coverage by <.01%.
The diff coverage is 100%.

@@              Coverage Diff               @@
##           release-2.3   #1808      +/-   ##
==============================================
+ Coverage           81%     81%   +<.01%     
==============================================
  Files               83      83              
  Lines             6649    6650       +1     
==============================================
+ Hits              5386    5387       +1     
  Misses            1263    1263

Impacted Files	Coverage Δ
mopidy/mpd/translator.py	95.4% <100%> (ø)	⬆️
mopidy/mpd/protocol/stored_playlists.py	90.96% <100%> (+0.05%)	⬆️

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