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

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https://hg.mozilla.org/integration/gaia-2_0/rev/a67d5472ddd5
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #20784 from crh0716/1023044

Bug 1023044 - Show the signal bar for a locked sim only when making emergency calls using the sim. r=alive

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https://hg.mozilla.org/integration/gaia-2_0/rev/d40ad5add813
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #20792 from crh0716/1022710

Bug 1022710 - Do not update the visibility of the items when the voice type is null r=eragon
Bumping manifests a=b2g-bump