code: String determineEmulatorLocation()
      {
          String location;
          if ( emulatorLocation != null )
          {
              location = emulatorLocation;
          }
          else
          {
              location = "SdkTools";
          }
          return location;
      }
docs: Get location value for emulator from command line option.
  
  @return if available return command line value otherwise return default value ("SdkTools").