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

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https://hg.mozilla.org/integration/gaia-2_0/rev/7f6741056a39
Author: steveck-chung <schung@mozilla.com>
Desc: Merge pull request #22177 from steveck-chung/message-safe-lazyloader

Bug 1041967 - [Messages] do some safe lazy load to improve launch latency. r=julienw
Conflicts:
	apps/sms/index.html

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https://hg.mozilla.org/integration/gaia-2_0/rev/9dd42796b779
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Revert "Merge pull request #22207 from svic/Bug_1043856"

This reverts commit 9369f7f9a4795d7d554c6c1ddb3c7daee3e4f994.
Bumping manifests a=b2g-bump