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

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https://hg.mozilla.org/integration/gaia-central/rev/23f9d71ddee3
Author: Yi-Fan Liao <yliao@mozilla.com>
Desc: Merge pull request #33010 from begeeben/1220996_user_cannot_go_to_home

Bug 1220996 - Catch before/after key events for non-mozbrowser iframe…

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https://hg.mozilla.org/integration/gaia-central/rev/f8ad544866af
Author: yifan <yliao@mozilla.com>
Desc: Bug 1220996 - Catch before/after key events for non-mozbrowser iframes in smart-system

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https://hg.mozilla.org/integration/gaia-central/rev/f504e8589ad8
Author: Carsten Book <tomcat@mozilla.com>
Desc: Merge pull request #32964 from hkasemir/1220978-Bluetooth-notificationhelper

Bug 1220978 - Migrate bluetooth app to notificationHelper. r=gandalf

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https://hg.mozilla.org/integration/gaia-central/rev/c62e85a2cf02
Author: Heidi Kasemir <heidi.kasemir@gmail.com>
Desc: Bug 1220978 - Migrate bluetooth app to notificationHelper

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "95047b652729496ec074acd85b0f1710dc28743e", 
+        "git_revision": "d9e3e3bc529221db6793cb9b116059070a65a287", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "27ebbdfeb0f4a51d3bc62605317ed77e1a7a7bc8", 
+    "revision": "23f9d71ddee34853b39aa67a7b16cd42a22d5f9c", 
     "repo_path": "integration/gaia-central"
 }