Bumping gaia.json for 4 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/04a70d9b7b96
Author: Rob Wood <rwood@mozilla.com>
Desc: Merge pull request #14427 from rwood-moz/bug946747

Bug 946747- Fix the gaia-ui endurance contacts tests; a=test-only

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https://hg.mozilla.org/integration/gaia-central/rev/3bc407d03471
Author: rwood-moz <rwood@mozilla.com>
Desc: One more minor fix

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https://hg.mozilla.org/integration/gaia-central/rev/f796e0d97bf7
Author: rwood-moz <rwood@mozilla.com>
Desc: Post-review updates

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https://hg.mozilla.org/integration/gaia-central/rev/573e46dce32f
Author: rwood-moz <rwood@mozilla.com>
Desc: Bug 946747- Fix the gaia-ui endurance contacts tests