code: public boolean setTypeface(GVRContext gvrContext, String font) {
          return setTypeface(gvrContext, font, fontStyleTypes.PLAIN);
      }
docs: Sets the typeface (font)
  @param gvrContext
  @param font
  a string that matches the font name saved in the assets directory
  Must include the file ending such as "myFont.ttf"
  
  @return