Update Gaia API documents for #8ae3596d2d1b215626aa3e7838ce078146e926c7
    Merge pull request #14404 from rnowm/sticky-headers-SMS

Bug 946693 - Fix sticky headers in [SMS] app
(cherry picked from commit a7d5a5e582b11b14ea7f43b5b6dc2db92a2d9131)