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

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https://hg.mozilla.org/integration/gaia-central/rev/ea734170c811
Author: vingtetun <21@vingtetun.org>
Desc: Merge pull request #21049 from vingtetun/bug1028650

Bug 1028650 - getConnectedDevices is not a function. r=21

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https://hg.mozilla.org/integration/gaia-central/rev/7a13c9cfffe5
Author: Damiens ROBERT <damiens@linux-7utd.site>
Desc: Bug 1028650 - getConnectedDevices is not a function. r=21
Bumping manifests a=b2g-bump