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

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https://hg.mozilla.org/integration/gaia-central/rev/31705094590a
Author: Rudy Lu <me@rudy.lu>
Desc: Merge pull request #22254 from RudyLu/keyboard/Bug1031561-no_auto_capitalize_acronym

Bug 1031561 - don't auto-capitalize when there are 2 uppercase letters in
r=djf

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https://hg.mozilla.org/integration/gaia-central/rev/11a98591a9ef
Author: Rudy Lu <me@rudy.lu>
Desc: Bug 1031561 - don't auto-capitalize when there are 2 uppercase letters
in front of the cursor.
Bumping manifests a=b2g-bump