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

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https://hg.mozilla.org/integration/gaia-2_0/rev/3a2e77770e3c
Author: KWierso <kwierso@gmail.com>
Desc: Revert "Merge pull request #22598 from KevinGrandon/bug_1049014_search_start_stop_grid" for Gu bustage

This reverts commit 7e207c9aef2b36692b8ae1f7ebdf02e84299aaed.
Bumping manifests a=b2g-bump