/usr/share/accounts/services/google-im.service is in account-plugin-google 0.11+14.04.20140409.1-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | <?xml version="1.0" encoding="UTF-8"?>
<service id="google-im">
  <type>IM</type>
  <name>GoogleTalk</name>
  <icon>im-google-talk</icon>
  <provider>google</provider>
  <translations>account-plugins</translations>
 
  
  <template>
    <group name="telepathy">
      <setting type="b" name="mc-readonly-params">true</setting>
      <setting name="manager">gabble</setting>
      <setting name="protocol">jabber</setting>
      <setting name="param-account">google.com</setting>
      <setting name="param-server">talk.google.com</setting>
      <setting name="param-fallback-servers">
        talkx.l.google.com;
        talkx.l.google.com:443,oldssl;
        talkx.l.google.com:80
      </setting>
      <setting name="param-extra-certificate-identities">talk.google.com</setting>
      <setting name="param-require-encryption">true</setting>
    </group>
  </template>
 
</service>
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