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

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https://hg.mozilla.org/integration/gaia-central/rev/4446ea70cf31
Author: Fernando Campo <fernando.campo@telefonica.com>
Desc: Merge pull request #19648 from fcampo/contacts-inline-css-1012651

Bug 1012651 - [Contacts] Remove inline style for CSP compliance (r=jmcf)

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https://hg.mozilla.org/integration/gaia-central/rev/1d5a132466ea
Author: Fernando Campo <fernando.campo@telefonica.com>
Desc: Bug 1012651 - [Contacts] Remove inline style for CSP compliance
Bumping manifests a=b2g-bump