File _service of Package android-headers

<services>
  <service name="obs_scm">
    <param name="url">git://github.com/ubports/android-headers.git</param>
    <param name="scm">git</param>
    <param name="revision">xenial</param>
    <param name="submodules">disable</param>
  </service>
  <service mode="buildtime" name="tar" />
  <service mode="buildtime" name="recompress">
    <param name="file">*.tar</param>
    <param name="compression">xz</param>
  </service>
  <service mode="buildtime" name="set_version" />
</services>