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

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https://hg.mozilla.org/integration/gaia-central/rev/d55575df4219
Author: EragonJ (E.J.) <eragonj@eragonj.me>
Desc: Merge pull request #25745 from EragonJ/bug-1086167

Bug 1086167 - [Settings] remove redundant Apps.mgmt calls based on new

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https://hg.mozilla.org/integration/gaia-central/rev/3a4fe552d9c1
Author: EragonJ <eragonj@eragonj.me>
Desc: Bug 1086167 - [Settings] remove redundant Apps.mgmt calls based on new
designed AppsCache
Bumping manifests a=b2g-bump