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

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https://hg.mozilla.org/integration/gaia-central/rev/cdd6574845eb
Author: Germán Toro del Valle <gtorodelvalle@gmail.com>
Desc: Merge pull request #22172 from gtorodelvalle/callscreen-bug-1043347-conference-participant-info-alignment

Bug 1043347 - [Dialer][Call Screen] Bad alignment of information in conference call overlay

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https://hg.mozilla.org/integration/gaia-central/rev/31409d17db7c
Author: German Toro del Valle <gtorodelvalle@gmail.com>
Desc: Bug 1043347 - [Dialer][Call Screen] Bad alignment of information in conference call overlay
Bumping manifests a=b2g-bump