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

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https://hg.mozilla.org/integration/gaia-central/rev/c03d5053b170
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #19960 from yzen/bug-1019362

Bug 1019362 - adding a number of gaia ui tests for the first time use ap...

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https://hg.mozilla.org/integration/gaia-central/rev/e86d7d700b2f
Author: Yura Zenevich <yzenevich@mozilla.com>
Desc: Bug 1019362 - adding a number of gaia ui tests for the first time use app accessibility.

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https://hg.mozilla.org/integration/gaia-central/rev/330c96d9726c
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #20694 from zacc/bug_1000037

Bug 1000037 - Refactor and re-enable test_import_contacts_gmail.py

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https://hg.mozilla.org/integration/gaia-central/rev/f070d8dccf46
Author: Zac <zcampbell@mozilla.com>
Desc: Bug 1000037 - Refactor and re-enable test_import_contacts_gmail.py
Bumping manifests a=b2g-bump