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

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https://hg.mozilla.org/integration/gaia-central/rev/150d304bae95
Author: Dominic Kuo <dkuo@mozilla.com>
Desc: Merge pull request #30477 from dominickuo/bug-1159610

Bug 1159610 - [Callscreen] Use the telephony's audio channel api to make telephony channel manageable by System app, r=gabrielesvelto

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https://hg.mozilla.org/integration/gaia-central/rev/eec1474eea5f
Author: Dominic Kuo <dkuo@mozilla.com>
Desc: Bug 1159610 - [Callscreen] Use the telephony's audio channel api to make telephony channel manageable by System app

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "1f89a95440766ad03a6406191588ee57ba6cbab0", 
+        "git_revision": "314cc9b2b56cfef14875101f2350aa3be15e7cae", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "342f81ba8afb78b7b74f431873470ecd9eba460b", 
+    "revision": "150d304bae955edb35fc1d470ccfcb7d1c27e0c4", 
     "repo_path": "integration/gaia-central"
 }