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

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https://hg.mozilla.org/integration/gaia-central/rev/453d338ad775
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #17628 from crh0716/988148

Bug 988148 - Hide the mobile connection state if it is emergency calls only and not primary sim r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/1ee808200b04
Author: Arthur Chen <crh0716@gmail.com>
Desc: Bug 988148 - Hide the mobile connection state if it is emergency calls only and not primary sim
Bumping manifests a=b2g-bump