Bumping gaia.json for 1 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/200ccf79991c
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Revert "Merge pull request #13230 from fbukevin/issue929377"

This reverts commit cca35de2ff8993be019b3da889bac406915cc212, reversing
changes made to 31687ef383bc1b85a9d388fb3dde610ab7e8f8fd.
Bumping gaia.json for 2 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/871c9c2aa082
Author: Fabien Cazenave <fabien@cazenave.cc>
Desc: Merge pull request #12134 from fabi1cazenave/macAddress-bug895739

Bug 895739 - [Wi-Fi] MAC address is always displayed as "not available", r=Arthur

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https://hg.mozilla.org/integration/gaia-central/rev/fd3cf07a9c84
Author: Fabien Cazenave <fabien@cazenave.cc>
Desc: Bug 895739 - [Wi-Fi] MAC address is always displayed as "not available"
Bumping gaia.json for 2 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/53c6a2b0bf4c
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #13385 from zacc/bug_935052_1

Bug 930532 - Python use self.apps.displayed_app in Gallery app object

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https://hg.mozilla.org/integration/gaia-central/rev/08def37fa403
Author: Zac Campbell <zcampbell@mozilla.com>
Desc: Bug 930532 - Python use self.apps.displayed_app in Gallery app object