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

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https://hg.mozilla.org/integration/gaia-central/rev/cd198e4a5536
Author: Marina <marina.rodrigueziglesias@telefonica.com>
Desc: Merge pull request #26355 from gitmai/bug-1089968-reset-usage-data

Bug 1089968 - [User Story] Reset usage data
r=salva

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https://hg.mozilla.org/integration/gaia-central/rev/c4ca18751b56
Author: mai <mri@tid.es>
Desc: Bug 1089968 - [User Story] Reset usage data
Bumping manifests a=b2g-bump