Bumping gaia.json for 2 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/4128b19cd495
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Merge pull request #11610 from samjoch/bug-904020-master-HDEmailManualSetupEmailHasASmallDropdown

Bug 904020 - [HD][Email] Manual Setup Email has a small dropdown

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https://hg.mozilla.org/integration/gaia-central/rev/195af4ceaf6a
Author: Sam Joch <samuel@guiora.com>
Desc: Bug 904020 - [HD][Email] Manual Setup Email has a small dropdown