Merge "Rename default value of RoamingType." into main

  // Roaming type

  enum RoamingType {

    // Unknown. The default value. Different from ROAMING_TYPE_UNKNOWN.

    UNKNOWN = -1;

    // Undefined. The default value. Different from ROAMING_TYPE_UNKNOWN.

    ROAMING_TYPE_UNDEFINED = -1;

    // In home network

    ROAMING_TYPE_NOT_ROAMING = 0;

  optional TelephonyOperator data_operator = 2;

  // Current voice network roaming type

  optional RoamingType voice_roaming_type = 3 [default = UNKNOWN];

  optional RoamingType voice_roaming_type = 3 [default = ROAMING_TYPE_UNDEFINED];

  // Current data network roaming type

  optional RoamingType data_roaming_type = 4 [default = UNKNOWN];

  optional RoamingType data_roaming_type = 4 [default = ROAMING_TYPE_UNDEFINED];

  // Current voice radio technology

  optional RadioAccessTechnology voice_rat = 5 [default = UNKNOWN];