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

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https://hg.mozilla.org/integration/gaia-central/rev/ae8b2f2aef48
Author: viorelaioia <viorela.ioia@softvision.ro>
Desc: Merge pull request #26841 from JohanLorenzo/bug-1109606-second-try

Bug 1109606 - Add a test to check that a miss call notification is clear...

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https://hg.mozilla.org/integration/gaia-central/rev/a83ff5cb7eec
Author: Johan Lorenzo <jlorenzo@mozilla.com>
Desc: Bug 1109606 - Add a test to check that a miss call notification is cleared even if a voicemail notification is present
Bumping manifests a=b2g-bump