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

========

https://hg.mozilla.org/integration/gaia-central/rev/e7a7c126f48f
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Merge pull request #22124 from giovannic/dialog

Dialog

========

https://hg.mozilla.org/integration/gaia-central/rev/b05413a6b8ac
Author: Giovanni Charles <giovanni.charles@gmail.com>
Desc: Bug 1043556 - Switch shared custom dialogs from using strings to using l10nIds r=alive r=mhenretty sr=dflanagan
Bumping manifests a=b2g-bump