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

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https://hg.mozilla.org/integration/gaia-2_0/rev/7492436ca055
Author: Rudy Lu <me@rudy.lu>
Desc: Merge pull request #20548 from RudyLu/settings/Bug1024695-waitFor_keyboard_settings_frame

Bug 1024695 - Intermittent keyboard_settings_test.js |
r=evanxd.
(cherry picked from commit 7b4665c7521a50e52b2053445d2a93c42a1f4ebd)
a=test-only
Bumping manifests a=b2g-bump