Fix wrong bytestring parsing in NFT informations + missing awaits

[lambertkevin]

• Fixing the wrong parsing inside of the Eth app. (No impact at all since it's purely for logging purposes)
• Fixing missing awaits leading to NFT Infos not getting fetched and fed to the nano.

Spec for the bytestring parsing: https://ledgerhq.atlassian.net/wiki/spaces/WALLETCO/pages/3269984297/NFT-1+NFT+Backend+design#NFT-Metadata-BLOB

[codecov[bot]]

Codecov Report

Merging #762 (4752ec5) into master (ae240fb) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #762   +/-   ##
=======================================
  Coverage   43.56%   43.56%           
=======================================
  Files          81       81           
  Lines        4823     4823           
  Branches      791      791           
=======================================
  Hits         2101     2101           
  Misses       2705     2705           
  Partials       17       17           

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[porenes]

@lambertkevin can you add in the merge commit a ticket number 🙏