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

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https://hg.mozilla.org/integration/gaia-central/rev/f626d50b5605
Author: Diego Marcos <diego.marcos@gmail.com>
Desc: Merge pull request #15956 from justindarc/master

Fixed sort() comparison in CameraUtils.selectOptimalPreviewSize().

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https://hg.mozilla.org/integration/gaia-central/rev/89351f78cf86
Author: Justin D'Arcangelo <justindarc@gmail.com>
Desc: Fixed sort() comparison in CameraUtils.selectOptimalPreviewSize().

Fixed rounding error in CameraUtils.selectOptimalPreviewSize() and added real-world test data.

Fixed sort() comparison in CameraUtils.selectOptimalPreviewSize().
Bumping manifests a=b2g-bump