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

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https://hg.mozilla.org/integration/gaia-central/rev/3bdb989edf4d
Author: Yi-Fan Liao <begeeben@gmail.com>
Desc: Merge pull request #22025 from begeeben/1004329_returning_home

Bug 1004329 - [Flatfish][Homescreen] Returning home (landscape) from portrait app causes app icons to misalign/overlap, r= Cristian Rodriguez (:crdlc)

* Fix ScreenHelper width/height error due to mediaQueryListener being fired twice right after maketplace app closed.

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https://hg.mozilla.org/integration/gaia-central/rev/74d7808aff71
Author: Yi-Fan Liao <begeeben@gmail.com>
Desc: Bug 1004329 - [Flatfish][Homescreen] Returning home (landscape) from portrait app causes app icons to misalign/overlap

* Fix ScreenHelper width/height error due to mediaQueryListener being fired twice right after maketplace app closed.
Bumping manifests a=b2g-bump