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

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https://hg.mozilla.org/integration/gaia-central/rev/aa0cf409f343
Author: Jim Porter <jporter@mozilla.com>
Desc: Merge pull request #31304 from jimporter/music-fix-repeat

Bug 1192710 - [Music]The repeat , next and last button in music playe…

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https://hg.mozilla.org/integration/gaia-central/rev/619d8dfd4803
Author: Jim <jporter@mozilla.com>
Desc: Bug 1192710 - [Music]The repeat , next and last button in music player are not available.

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https://hg.mozilla.org/integration/gaia-central/rev/94d3570ec682
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Revert "Merge pull request #31215 from borjasalguero/update_rebased"

This reverts commit b7e16d84847574c1223f6b88307c673528873d5b, reversing
changes made to 86eab1fd117501f499c67588021ed905498ec01c.

b2g/config/gaia.json

 {
     "git": {
-        "git_revision": "79b9da4db1b7ac7cdbf7a1879731994d2bc88daf", 
+        "git_revision": "9a8880a95ee4a4aea7895d4e2bcab31bc49ea281", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "3890abfa84a2e01454d1d83b4cd97b6cdfb4a4da", 
+    "revision": "aa0cf409f343d966a552839ab5d3bc85d1ebdda9", 
     "repo_path": "integration/gaia-central"
 }