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

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https://hg.mozilla.org/integration/gaia-central/rev/22b495e0d2bf
Author: steveck-chung <schung@mozilla.com>
Desc: Merge pull request #23466 from steveck-chung/network-alerts-api-work

Bug 1051795 - [CMAS] Handle the setting that enables/disables CMAS alerts. r=azasypkin

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https://hg.mozilla.org/integration/gaia-central/rev/5914bd9df928
Author: Steve Chung <schung@mozilla.com>
Desc: Bug 1051795 - [CMAS] Handle the setting that enables/disables CMAS alerts

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "5b3e28e264065458b65fb72465d74e1174ca10a5", 
+    "revision": "22b495e0d2bf49eb556670763629a7ef469b1ab8", 
     "repo_path": "/integration/gaia-central"
 }