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

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https://hg.mozilla.org/integration/gaia-central/rev/a0575184a0fb
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #25311 from jmcanterafonseca/fix_select_contact

Bug 1085251 - [Contacts] [Regression] Pick Contact Activity does not sho...

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https://hg.mozilla.org/integration/gaia-central/rev/003680fbec06
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 1085251 - [Contacts] [Regression] Pick Contact Activity does not show the dismiss button
Bumping manifests a=b2g-bump