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

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https://hg.mozilla.org/integration/gaia-central/rev/ae36b86fdfa0
Author: Yura Zenevich <yura.zenevich@gmail.com>
Desc: Merge pull request #22548 from yzen/bug-1040936

Bug 1040936 - added value selector subcomponent to system dialog compone...

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https://hg.mozilla.org/integration/gaia-central/rev/384be92e6b4d
Author: Yura Zenevich <yzenevich@mozilla.com>
Desc: Bug 1040936 - added value selector subcomponent to system dialog components. Improved a11y visibility for system dialogs.
Bumping manifests a=b2g-bump