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

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https://hg.mozilla.org/integration/gaia-central/rev/e20944556ca1
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #23762 from crh0716/1061532

Bug 1061532 - Only set the category of a newly apn item to custom when restoring from a custom apn setting r=eragonj

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https://hg.mozilla.org/integration/gaia-central/rev/82191c3c66e1
Author: Arthur Chen <crh0716@gmail.com>
Desc: Bug 1061532 - Only set the category of a newly apn item to custom when restoring from a custom apn setting

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https://hg.mozilla.org/integration/gaia-central/rev/c651957564bf
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #24053 from jmcanterafonseca/fix_settings_tap

Bug 1058449 - Tapping on the settings button in contacts doesn't have an...

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https://hg.mozilla.org/integration/gaia-central/rev/3a9414794aaf
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 1058449 - Tapping on the settings button in contacts doesn't have any effect
Bumping manifests a=b2g-bump