docs: protected static int[] appendUnknownNetworkTypeToTypes(int[] types) {
      int i = 0;
      final int[] extendedTypes = new int[types.length + 1];
      for (int type : types) {
        extendedTypes[i] = type;
        i++;
      }
      extendedTypes[i] = Connectivity.UNKNOWN_TYPE;
      return extendedTypes;
    }