message: Fix Mobile and HMI API RdsData sturcture according to proposal
  There is some difference between RdsData sturcture in current API
  and in proposal. This one in HMI API is ok but in Mobile API there
  is some differences.
diff: </enum>
  <struct name="RdsData">
  - <param name="PS" type="String" minlength="0" maxlength="8" mandatory="true" >
  + <param name="PS" type="String" minlength="0" maxlength="8" mandatory="false" >
  <description>Program Service Name</description>
  </param>
  - <param name="RT" type="String" minlength="0" maxlength="64" mandatory="true" >
  + <param name="RT" type="String" minlength="0" maxlength="64" mandatory="false" >
  <description>Radio Text</description>
  </param>
  <param name="CT" type="String" minlength="22" maxlength="28" mandatory="false">
  <description>The clock text in UTC format as YYYY-MM-DDThh:mm:ss.sTZD</description>
  </param>
  - <param name="PI" type="String" minlength="0" maxlength="6" mandatory="true" >
  + <param name="PI" type="String" minlength="0" maxlength="6" mandatory="false" >
  <description>Program Identification - the call sign for the radio station</description>
  </param>
  - <param name="PTY" type="Integer" minvalue="0" maxvalue="31" mandatory="true" >
  + <param name="PTY" type="Integer" minvalue="0" maxvalue="31" mandatory="false" >
  <description>The program type - The region should be used to differentiate between EU and North America program types</description>
  </param>
  - <param name="TP" type="Boolean" mandatory="true" >
  + <param name="TP" type="Boolean" mandatory="false" >
  <description>Traffic Program Identification - Identifies a station that offers traffic</description>
  </param>
  - <param name="TA" type="Boolean" mandatory="true" >
  + <param name="TA" type="Boolean" mandatory="false" >
  <description>Traffic Announcement Identification - Indicates an ongoing traffic announcement</description>
  </param>
  - <param name="REG" type="String" mandatory="true" >
  + <param name="REG" type="String" mandatory="false" >
  <description>Region</description>
  </param>
  </struct>
  