Bumping gaia.json for 3 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/f522e212c86a
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Merge pull request #11202 from davidflanagan/bug896907

Bug 896907: let the user preview a captured video before picking it r=daleharvey,johnhu

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https://hg.mozilla.org/integration/gaia-central/rev/b682c140d18f
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Bug 896907: let the user preview a captured video before picking it

address review comments

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https://hg.mozilla.org/integration/gaia-central/rev/f423657e3f3d
Author: John Ford <john@johnford.info>
Desc: Revert "Bug 782211 - Update Gaia with additional functionality to support Notification API."

This reverts commit 359b76d47ad2694c7237332797b818c3f5b0e53b.

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "f4043cffc4430d85e3edafd92fc6a8c21b2a038a", 
+    "revision": "f522e212c86a7e6d72cb54b9f5ff04398bd05ab7", 
     "repo_path": "/integration/gaia-central"
 }