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

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https://hg.mozilla.org/integration/gaia-central/rev/389511f8e115
Author: John Hu <johu@mozilla.com>
Desc: Merge pull request #26736 from huchengtw-moz/bug-1110652-base

Bug 1110652 - [Stingray] create and use interactive notification to show..., r=rexboy

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https://hg.mozilla.org/integration/gaia-central/rev/de9abf5bd8cb
Author: John Hu <johu@mozilla.com>
Desc: Bug 1110652 - [Stingray] create and use interactive notification to show desktop-notification
Bumping manifests a=b2g-bump