Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/09f324125d19
Author: autolander <bug.autolander@gmail.com>
Desc: Bug 1069223 - merge pull request #27794 from FunkTron:Bug1069223 to mozilla-b2g:master

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https://hg.mozilla.org/integration/gaia-central/rev/7631fd663ed4
Author: funktron <ross.ziegler@imross.com>
Desc: Bug 1069223 - updated all FM App controls with accessibility ids and/or roles

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https://hg.mozilla.org/integration/gaia-central/rev/7c6ccf5c28ed
Author: autolander <bug.autolander@gmail.com>
Desc: Bug 1120857 - merge pull request #28150 from millermedeiros:1120857-lockscreen-notification to mozilla-b2g:master

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https://hg.mozilla.org/integration/gaia-central/rev/a0db749787c4
Author: Miller Medeiros <miller@millermedeiros.com>
Desc: Bug 1120857 - [Calendar] On lockscreen, tap the "Open" button beside event, it enter Homescreen instead of event‘s detail view.

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "f0b93e0668ef9565bd6f050b15b4f794d59feb65", 
+        "git_revision": "fa244edb7b89bf5331da2ddc87875845eec8e675", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "d170342f8e1837435749392fc2bded3b9fee01d4", 
+    "revision": "09f324125d190c753aada62fc04e75451e400f30", 
     "repo_path": "integration/gaia-central"
 }