Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/1f41a654b331
Author: Dave Hunt <dave.hunt@gmail.com>
Desc: Bug 1099126 - Bump gaiatest version to 0.31. a=test-only r=me

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https://hg.mozilla.org/integration/gaia-central/rev/9d75d2cce786
Author: Ryan VanderMeulen <ryanvm@gmail.com>
Desc: Merge pull request #26016 from mancas/bug1091483_v2.2

Bug 1091483 - Unable to show stk dialog (e.g. user confirmation dialog) ...

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https://hg.mozilla.org/integration/gaia-central/rev/509b31a375fd
Author: Manuel Casas <manuel.casasbarrado@telefonica.com>
Desc: Bug 1091483 - Unable to show stk dialog (e.g. user confirmation dialog) when foreground app is Callscreen

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "2a4b24695c894bf3a2e0c692b385a97fba91c909", 
+    "revision": "1f41a654b3311705e7d71ff9b2137d3340c6c272", 
     "repo_path": "integration/gaia-central"
 }