Fix incorrect emoji presentation for 'Zsym' script

If the language tag "und-Zsym" is applied to a TextView, the default
presentation should be text-style. However, it didn't work before this
patch, due to a lack of "und-Zsym" language tag in fonts.xml.

Bug: 31297127
Change-Id: Ieed8fe1532806dd1e75c58aa0d7a724bfeed7796
2 files changed