Avoid bigger fonts being default for languages

* Avoided Amiri being default font for ar
* Avoided CharisSIL, DuolosSIL being default fonts for
cdo, nan respectively

The change is because of the bandwidth efficiency concerns. Also
Arabic being widely supported language, having defaut font is not
must.

Change-Id: I657d08ded26f25342d18483f6c5a0393f625001b