Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/a0167456f476
Author: Rudy Lu <me@rudy.lu>
Desc: Revert "Bug 971446 - [Keyboard] Add a slight delay to text bubbles and highlighting disappearing. r=rudyl"

This reverts commit 2a0b913687ae96b2e60770b9f7d27b82b6b03893.
Bumping manifests a=b2g-bump