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

========

https://hg.mozilla.org/integration/gaia-central/rev/c186013c7287
Author: Marina <mri@tid.es>
Desc: Merge pull request #25075 from gitmai/bug-1081852-missed-checkboxes

Bug-1081852 [Costcontrol] Checkboxes are missing

========

https://hg.mozilla.org/integration/gaia-central/rev/6c02efcc749c
Author: mai <mri@tid.es>
Desc: Bug-1081852 [Costcontrol] Checkboxes are missing
Bumping manifests a=b2g-bump