code: public void setTextHaloColor(@ColorInt int color) {
      jsonObject.addProperty(SymbolOptions.PROPERTY_TEXT_HALO_COLOR, ColorUtils.colorToRgbaString(color));
    }
docs: Set the TextHaloColor property
  <p>
  The color of the text's halo, which helps it stand out from backgrounds.
  </p>
  <p>
  To update the symbol on the map use {@link SymbolManager#update(Annotation)}.
  <p>
  
  @param color value for String