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

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https://hg.mozilla.org/integration/gaia-central/rev/11436e5bd29b
Author: Francisco Borja Salguero Castellano <borjasalguero@users.noreply.github.com>
Desc: Merge pull request #13470 from borjasalguero/bug_mimetype_ringtone

Bug 935411 - [Single Variant] The device does not ring when receiving a ...

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https://hg.mozilla.org/integration/gaia-central/rev/38284870d692
Author: borjasalguero <fbsc@tid.es>
Desc: Bug 935411 - [Single Variant] The device does not ring when receiving a call after being configured with single variant r=albert