src/ledservice/etc/dbus-1/com.android.LEDService.conf

<!DOCTYPE busconfig PUBLIC
 "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
 "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
<busconfig>
  <policy user="root">
    <allow send_destination="com.android.LEDService" />
  </policy>

  <policy group="ledservice">
    <allow send_destination="com.android.LEDService" />
  </policy>

  <policy user="ledservice">
    <allow own="com.android.LEDService" />
  </policy>
</busconfig>