Bumping gaia.json for 6 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/20db0a074a97
Author: Johan Lorenzo <jlorenzo@mozilla.com>
Desc: Merge pull request #31611 from JohanLorenzo/bug-1196717

Bug 1196717 - Dogfood test - Delete thread in SMS

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https://hg.mozilla.org/integration/gaia-central/rev/9c3c875eb3a7
Author: Johan Lorenzo <jlorenzo@mozilla.com>
Desc: Bug 1196717 - Dogfood test - Delete thread in SMS

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https://hg.mozilla.org/integration/gaia-central/rev/e9b47d1d18c0
Author: Etienne Segonzac <etienne@segonzac.info>
Desc: Merge pull request #31737 from etiennesegonzac/bug-1197738

Bug 1197738 - Take #2, fixing the menu transition without breaking the js engine r=albertopq

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https://hg.mozilla.org/integration/gaia-central/rev/73e651d429c3
Author: Etienne Segonzac <etienne@segonzac.info>
Desc: Bug 1197738 - Take #2, fixing the menu transition without breaking the js engine

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https://hg.mozilla.org/integration/gaia-central/rev/dceba3fb6595
Author: Johan Lorenzo <jlorenzo@mozilla.com>
Desc: Merge pull request #31675 from JohanLorenzo/bug-1184511

Bug 1184511 - [Aries] test_settings_device_info fails because only 1 …

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https://hg.mozilla.org/integration/gaia-central/rev/99ebb8a2a579
Author: Johan Lorenzo <jlorenzo@mozilla.com>
Desc: Bug 1184511 - [Aries] test_settings_device_info fails because only 1 IMEI is displayed

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "2ba46821f800d7170d54d22118a2c73f2b341ce9", 
+        "git_revision": "b6ed22f1e46e72430297cc000f0db53d22a0f10a", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "b43f3c31856d0b7ac2c88f084cbcd900367980f7", 
+    "revision": "20db0a074a97284a21856a217f0487cf9d9021c4", 
     "repo_path": "integration/gaia-central"
 }