Add Hussaini Nastaleeq font for Urdu

* Added Hussaini Nastaleeq font.
* Added custom license text for Hussaini Nastaleeq.
* Updated licenses/README for new license.

Bug: 56939
Change-Id: Icd28de1172783c794ac16aaa60e27056b728fb28
Merge "Add Hussaini Nastaleeq font for Urdu"