Update Gaia API documents for #bae6b97c8f5d0ebb443b6da989bb8ae3dc9cc647
    Revert "Merge pull request #13852 from bgirard/HomescrenBackground"

This reverts commit d14af806d87a2ca6098ca0a011256cb3b1d4cf9a, reversing
changes made to 5e978dcebd7d122fd11988467c0d300dc51494c3.