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

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https://hg.mozilla.org/integration/gaia-2_1/rev/4c1bf2ad5452
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Revert "Bug 1065519 - Ambient indicator based on list of notifications"

This reverts commit b7b59f0fd59d9aaeeedb209945865da893b37f3c.
Bumping manifests a=b2g-bump