Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/7b8eadddd407
Author: evelynhung <jj.evelyn@gmail.com>
Desc: Merge pull request #19327 from hfiguiere/bug1011168

Fixes test breakage for the settings wifi panel rendering test. r=evelyn

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https://hg.mozilla.org/integration/gaia-central/rev/095eac0289bb
Author: Hubert Figuière <hub@figuiere.net>
Desc: Bug 1011575 - Fix the settings-panel-wifi-visible perf event.

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https://hg.mozilla.org/integration/gaia-central/rev/a2651537e453
Author: Hubert Figuière <hub@figuiere.net>
Desc: Bug 1011168 - Wait for the wifi item to be enabled before tapping it. r=
Bumping manifests a=b2g-bump