Update Gaia API documents for #3508d5c030f3c3474a6566140aa663d07801d333
    Merge pull request #14655 from jaoo/946548

Bug 946548 - [DSDS] [Gaia]: support setting preferred network type for each sim. r=arthurcc(cherry picked from commit 5d53d86675a91ced588e10239dbe136b78d528cc)