Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/a116b378c3cf
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Merge pull request #22160 from pivanov/bug-1043496

Bug 1043496 - Default Image for Contacts When Image is Missing

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https://hg.mozilla.org/integration/gaia-central/rev/9089915554b0
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Bug 1043496 - Default Image for Contacts When Image is Missing

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https://hg.mozilla.org/integration/gaia-central/rev/bceb894d967a
Author: Zac <zcampbell@mozilla.com>
Desc: Bug 1038698 - Disable test_a11y_utility_tray_visibility.py - red on TBPL
Bumping manifests a=b2g-bump