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

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https://hg.mozilla.org/integration/gaia-central/rev/a9afc2df4db3
Author: EragonJ <eragonj@eragonj.me>
Desc: Merge pull request #19747 from EragonJ/bug-1014417

Bug 1014417 - Support Contacts are not configured correctly for customiz...

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https://hg.mozilla.org/integration/gaia-central/rev/fe4303da6478
Author: EragonJ <eragonj@eragonj.me>
Desc: Bug 1014417 - Support Contacts are not configured correctly for customization

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https://hg.mozilla.org/integration/gaia-central/rev/d846c7977c46
Author: EragonJ <eragonj@eragonj.me>
Desc: Merge pull request #19802 from EragonJ/bug-1006807

Bug 1006807 - Uninstalling from app permissions does not return you to p...

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https://hg.mozilla.org/integration/gaia-central/rev/df01ae60e832
Author: EragonJ <eragonj@eragonj.me>
Desc: Bug 1006807 - Uninstalling from app permissions does not return you to previous screen
Bumping manifests a=b2g-bump