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

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https://hg.mozilla.org/integration/gaia-central/rev/f8bc67a49819
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #24042 from jmcanterafonseca/fix_carrier_issue

Bug 1067251 - [Contacts] [Regression] Cannot reset phone field when edit...

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https://hg.mozilla.org/integration/gaia-central/rev/027da82828de
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 1067251 - [Contacts] [Regression] Cannot reset phone field when editing a contact

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https://hg.mozilla.org/integration/gaia-central/rev/d59b0ecae741
Author: Ben Francis <ben@tola.me.uk>
Desc: Merge pull request #24058 from benfrancis/1067431

Bug 1067431 - Add final search icon assets for expanded Rocketbar r=vingtetun

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https://hg.mozilla.org/integration/gaia-central/rev/e407387b7d8a
Author: Ben Francis <ben@tola.me.uk>
Desc: Bug 1067431 - Add final search icon assets for expanded Rocketbar
Bumping manifests a=b2g-bump