Bumping gaia.json for 2 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/4162cfae8bcd
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #11865 from julienw/902497-use-asynchronous-updateSmsSegmentLimit

Bug 902497 - [sms][mms] use the new asynchronous getSegmentInfoText from...

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https://hg.mozilla.org/integration/gaia-central/rev/7556e1af5335
Author: Julien Wajsberg <felash@gmail.com>
Desc: Bug 902497 - [sms][mms] use the new asynchronous getSegmentInfoText from bug 903403 for updateSmsSegmentLimit r=schung

* we don't call getSegmentInfoForText more than once every 500ms
* getSegmentInfoForText is now asynchronous and the new code is handling this
* we now do the composeForm dataset type change in ThreadUI. As a result, the
  "type" event, sent by Compose, is not cancelable anymore, because we don't use
  this anymore.