I found the solution. Looks like this was HTML Entity encoding, so for decoding you must Use Apache StringEscapeUtils.unescapeHtml4() method.
TextView contentView = (TextView)view.findViewById(R.id.contentPreview);
SpannableString contentText = (SpannableString) contentView.getText();
String htmlEncodedString = Html.toHtml(contentText);
String decodedString = StringEscapeUtils.unescapeHtml4(htmlEncodedString);
Log.e("Content Text",decodedString);