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

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https://hg.mozilla.org/integration/gaia-central/rev/a206016847a4
Author: Sherman Chen <shamenchens@users.noreply.github.com>
Desc: Merge pull request #22466 from shamenchens/Bug1048118-SettingsInternetSharingL10N

Bug 1048118 - Add back internet sharing l10n string, r=flod

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https://hg.mozilla.org/integration/gaia-central/rev/84d4ef62d1f1
Author: Sherman Chen <shamen.chens@gmail.com>
Desc: Bug 1048118 - Add back internet sharing l10n string
Bumping manifests a=b2g-bump