Update Gaia API documents for #1804f2b8c8ed3a9902f129911e545cea72be0852
    Merge pull request #14909 from davidflanagan/bug951932

Bug 951932: don't allow pick from Music for ringtones r=dmarcos(cherry picked from commit 8cbb66618c118aba48fd6f49b830f5f76a77e5fb)