Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/840998c861bf
Author: Zibi Braniecki <zbigniew.braniecki@gmail.com>
Desc: Merge pull request #26622 from zbraniecki/1107230-remove-cleardesktopnotifications

Bug 1107230 - Remove clearDesktopNotifications. r=etienne

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https://hg.mozilla.org/integration/gaia-central/rev/3bcd56709f9f
Author: Zbigniew Braniecki <gandalf@mozilla.com>
Desc: Bug 1107230 - Remove clearDesktopNotifications

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https://hg.mozilla.org/integration/gaia-central/rev/4b5affbb073b
Author: Johan Lorenzo <jlorenzo@mozilla.com>
Desc: Merge pull request #26594 from bebef1987/rocket_bar

Bug 1087274 - Update test names because everythingme was replaced form F...

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https://hg.mozilla.org/integration/gaia-central/rev/2d25ca3b2125
Author: bebef1987 <florin.strugariu@softvision.ro>
Desc: Bug 1087274 - Update test names because everythingme was replaced form FF OS and now it's called Rocketbar
Bumping manifests a=b2g-bump