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

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https://hg.mozilla.org/integration/gaia-2_0/rev/3da2fd98bfb5
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Bug 1054953: make the FL app handle the incorrect audio/mp3 mime type

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https://hg.mozilla.org/integration/gaia-2_0/rev/b28fab4312cd
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #21909 from crh0716/1038496

Bug 1038496 - Re-enable radio when rild crashes r=alive
Bumping manifests a=b2g-bump