Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/07aa730d05a7
Author: Justin D'Arcangelo <justindarc@gmail.com>
Desc: Merge pull request #31979 from justindarc/bug1206782

Bug 1206782 - [Music][NGA] Scan progress UI needs implemented

========

https://hg.mozilla.org/integration/gaia-central/rev/971b0236d50a
Author: Justin D'Arcangelo <justindarc@gmail.com>
Desc: Bug 1206782 - [Music][NGA] Scan progress UI needs implemented

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "8154e6cdfd44cc6107aa95f38316146504661bea", 
+        "git_revision": "aef4ee5f016b2fe0d49da47ec4b2129507eab45c", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "5c01c4184313081c3234a7b49fa243d38d476d1e", 
+    "revision": "07aa730d05a74ea42af2c415397ab385180370f7", 
     "repo_path": "integration/gaia-central"
 }