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

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https://hg.mozilla.org/integration/gaia-central/rev/22eff91468d8
Author: George <georgeiscoming@gmail.com>
Desc: Merge pull request #11875 from cctuan/911576

Bug 911576 - [Flatfish] fix bug of unwatch for screen_layout.js

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https://hg.mozilla.org/integration/gaia-central/rev/d2c14417205b
Author: cctuan <georgeiscoming@gmail.com>
Desc: Bug 911576 - fix bug of unwatch for screen_layout.js