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

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https://hg.mozilla.org/integration/gaia-central/rev/481b722fb0bd
Author: George <georgeiscoming@gmail.com>
Desc: Merge pull request #11707 from cctuan/896934-2

ug 896934 - [Settings] Listen new system message for Bluetooth pairing requests in connectivity.js

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https://hg.mozilla.org/integration/gaia-central/rev/51251769f82b
Author: cctuan <georgeiscoming@gmail.com>
Desc: Bug 896934 - [Settings] Listen new system message for Bluetooth pairing requests in connectivity.js
Bug 903058 - rewrite SMS test cases for filtering with single number. r=gene