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

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https://hg.mozilla.org/integration/gaia-central/rev/cff0262dcdc3
Author: albertopq <albert.pastor@gmail.com>
Desc: Merge pull request #25215 from albertopq/1073032-add-tests

Bug 1073032 - Adding integration tests to the ambient indicator r=etienne

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https://hg.mozilla.org/integration/gaia-central/rev/c201e6b4a900
Author: albertopq <apastor@mozilla.com>
Desc: Bug 1073032 - Adding integration tests to the ambient indicator
Bumping manifests a=b2g-bump