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

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https://hg.mozilla.org/integration/gaia-central/rev/3695bad19b70
Author: Ben Kelly <bkelly@mozilla.com>
Desc: Merge pull request #12526 from wanderview/contacts-loadchunk-no-search

Bug 921802: Do not require search while loading contacts. r=jmcf

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https://hg.mozilla.org/integration/gaia-central/rev/7941ab060beb
Author: Ben Kelly <ben@wanderview.com>
Desc: Bug 921802: Do not require search while loading contacts

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https://hg.mozilla.org/integration/gaia-central/rev/af518ee97e6b
Author: Germán Toro del Valle <gtorodelvalle@gmail.com>
Desc: Merge pull request #12506 from gtorodelvalle/contacts-dialer-916010-duplicate-contact-details-reloaded

Bug 916010 - [Contacts] Follow up for visual polish of bug 902399

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https://hg.mozilla.org/integration/gaia-central/rev/e23571af8b49
Author: Germán Toro del Valle <gtorodelvalle@gmail.com>
Desc: Bug 916010 - [Contacts] Follow up for visual polish of bug 902399.