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

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https://hg.mozilla.org/integration/gaia-central/rev/2277cc4efa33
Author: bhearsum <bhearsum@gmail.com>
Desc: Merge pull request #19685 from bhearsum/dvorak

Enable dvorak keyboard.

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https://hg.mozilla.org/integration/gaia-central/rev/e9226242cd13
Author: Ben Hearsum <bhearsum@mozilla.com>
Desc: Enable dvorak keyboard.
Bumping manifests a=b2g-bump