Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/ee84a16179e7
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #23378 from KevinGrandon/bug_1052503_progress_indicator_steps

Bug 1052503 - [GaiaProgress] Try using keyframe steps

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https://hg.mozilla.org/integration/gaia-central/rev/8a086b431433
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1052503 - [GaiaProgress] Try using keyframe steps r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/51714f1a762c
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Revert "Merge pull request #22880 from frsela/STK/Bug1026556"

This reverts commit 66c5ef590b6fd75865fd215dc632c561afdeffc9, reversing
changes made to 111257ab1d64cc4d27295de8b92fc553aedcc858.
Bumping manifests a=b2g-bump