Bumping gaia.json for 2 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/dc7efbd4a093
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Merge pull request #14646 from Neeraj-Seth/bug-949034_lock_screen_off_reappear

Bug 949034 - Fully disable lock screen even if passcode is set, r=arthurcc, alive

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https://hg.mozilla.org/integration/gaia-central/rev/935c18a55946
Author: Neeraj Kumar <neeraj_kumar@hcl.com>
Desc: Bug 949034 - [B2G][Lockscreen]Lock screen still appears when re-opening the phone after switching it off if a passcode has been created

Bug 949034 - [B2G][Lockscreen]Lock screen still appears when re-opening the phone after switching it off if a passcode has been created