Support paragraph tag <p> in markup

Support paragraph tag <p> in markup

Paragraph tag is used as block of text start & end with new-line (implicitly).

The paragraph tag is nedded to support styles on paragraph level in markup. They are attributes for paragraph tag like: Align, Direction (LTR, RTL), Wrap, etc.

Example:
Text:
"Before paragraph <p>first paragraph</p><p>second paragraph</p><p>new line \n third paragraph</p>After paragraph"

Output:
============================
| Before paragraph         |
| first paragraph          |
| second paragraph         |
| new line                 |
| third paragraph          |
| After paragraph          |
============================

How to apply it in TextEditor:
 textEditor.SetProperty(TextEditor::Property::ENABLE_MARKUP, true);
 textEditor.SetProperty(TextEditor::Property::TEXT, "text one <p>Paragraph two</p> text three <p>Paragraph four</p> text five");

How to apply it in TextLabel:
 textLabel.SetProperty(TextLabel::Property::MULTI_LINE, true);
 textLabel.SetProperty(TextLabel::Property::ENABLE_MARKUP, true);
 textLabel.SetProperty(TextLabel::Property::TEXT, "text one <p>Paragraph two</p> text three <p>Paragraph four</p> text five");

Change-Id: Icee044db488d82646758ccc59a23ce896a3e28c7