Update Gaia API documents for #cbd29217ea37209449774b0c31cbfbdd2da6ee68
    Merge pull request #14522 from ian-liu/settings/Bug926334_To_support_WPAEAP_options_PEAP_TLS_TTLS

Bug 926334 - [Gaia] To support WPA-EAP options(PEAP, TLS, TTLS) and manage certificate in WLAN setting. r=@crh0716
(cherry picked from commit eaf1e57b731914122fc9a139fc3538b522024de9)