code: String determineAvd()
      {
          String avd;
          if ( emulatorAvd != null )
          {
              avd = emulatorAvd;
          }
          else
          {
              avd = "Default";
          }
          return avd;
      }
docs: Get avd value for emulator from command line option.
  
  @return if available return command line value otherwise return default value ("Default").