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

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https://hg.mozilla.org/integration/gaia-central/rev/51371becbe70
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Revert "Merge pull request #28730 from zbraniecki/1116613-smart-strategy-for-l10n-timestamps"

This reverts commit 7d5337556f92647cb12c99bc1e33a6cf959f4316, reversing
changes made to 3325c49b8ca9b238399acf045efbbb7993269d66.

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https://hg.mozilla.org/integration/gaia-central/rev/a72aaf99c75a
Author: Ian Liu <iliu@mozilla.com>
Desc: Merge pull request #28134 from ian-liu/settings/bluetooth/bug1121904_implement_connect/disconnect_dialog_for_a_paired_device/headset_for_v2

Bug 1121904 - [Bluetooth][Settings] Show connect/disconnect/unpair dialog for a paired device/headset. r=arthur

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https://hg.mozilla.org/integration/gaia-central/rev/eb22c8229f66
Author: ian-liu <iliu@mozilla.com>
Desc: Bug 1121904 - [Bluetooth][Settings] Show connect/disconnect/unpair dialog for a paired device/headset. r=arthur

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "5844bf6c5acc964b14f9e568f9e992de443122a2", 
+        "git_revision": "cef185cdc784c98255c0c68c89c7e1ca8a83a526", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "e6283c00cdd9afa7f37618f1c5ad118fad6c88bf", 
+    "revision": "51371becbe707e49d9247cc4740a8861de82a305", 
     "repo_path": "integration/gaia-central"
 }