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

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https://hg.mozilla.org/integration/gaia-central/rev/c1addaad7df5
Author: Florin Strugariu <florin.strugariu@softvision.ro>
Desc: Merge pull request #26030 from davehunt/bug1074117-contacts

Bug 1074117 - Use expected conditions and optimise element lookups in contacts app object

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https://hg.mozilla.org/integration/gaia-central/rev/292b0cf2b16e
Author: Dave Hunt <dave.hunt@gmail.com>
Desc: Bug 1074117 - Use expected conditions where appropriate and optimise element lookups in contacts app object. r=fstrugariu
Bumping manifests a=b2g-bump
Bug 1022791 - Keep previous values for PROMPT permissions on system updates. r=fabrice
Bug 1040651 - Map a preference to a Gaia setting to enable Layerscope. r=fabrice

Add a listener at Gecko side. We will also add a "LayerScope" option
in "Settings -> Developer", so we can enable Layerscope dynamically.