Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-2_0/rev/d2aaa3189770
Author: steveck-chung <schung@mozilla.com>
Desc: Merge pull request #20973 from steveck-chung/bug-1022644

Bug 1022644 - [Messages] Can't open the recipient panel if there are only 2 lines of recipients. r=azasypkin
Bumping manifests a=b2g-bump