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

========

https://hg.mozilla.org/integration/gaia-central/rev/3dcd8a9f20be
Author: Yura Zenevich <yura.zenevich@gmail.com>
Desc: Merge pull request #23439 from yzen/bug-1037047

Bug 1037047 - fixed call options off screen transition screen reader vis...

========

https://hg.mozilla.org/integration/gaia-central/rev/314140690f20
Author: Yura Zenevich <yzenevich@mozilla.com>
Desc: Bug 1037047 - fixed call options off screen transition screen reader visibility. r=drs
Bumping manifests a=b2g-bump