Bumping gaia.json for 5 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/20a183aa2a2c
Author: Gabriele Svelto <gsvelto@mozilla.com>
Desc: Merge pull request #30388 from gabrielesvelto/bug-1155901-resize-call-ended-string

Bug 1155901 - Dynamically resize the 'call ended' string whenever it's translated

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https://hg.mozilla.org/integration/gaia-central/rev/4ce7b1e1d0fb
Author: Gabriele Svelto <gsvelto@mozilla.com>
Desc: Bug 1155901 - Dynamically resize the 'call ended' string whenever it's translated r=thills

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https://hg.mozilla.org/integration/gaia-central/rev/91ed8bc7fc40
Author: Yura Zenevich <yura.zenevich@gmail.com>
Desc: Merge pull request #30938 from yzen/bug-1183128

Bug 1183128 - moving tracking of quick settings state from DOM to JS.

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https://hg.mozilla.org/integration/gaia-central/rev/f06e99bfc939
Author: Yura Zenevich <yzenevich@mozilla.com>
Desc: Bug 1183128 - moving tracking of quick settings state from DOM to JS.

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https://hg.mozilla.org/integration/gaia-central/rev/5f20babbd394
Author: Yura Zenevich <yzenevich@mozilla.com>
Desc: Bug 1180021 - fixging quick settings and the way it's tracking enabled services.

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "a550cbf356c5dd9ce3f2939ea260dfe73692e2d4", 
+        "git_revision": "bc1d19af4d9d338c7cea23dd126c52814176db9f", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "78b0c1e520654715affe0e05eaa7548e4d403897", 
+    "revision": "20a183aa2a2cebedb70fa5b62fe48dd67a22d53d", 
     "repo_path": "integration/gaia-central"
 }