Do not break before and after ZWJ.

The emoji list is generated from external/unicode/emoji-data.txt

Bug: 28248662
Change-Id: Ie49b3782505665d62c24371ca23d317ae5e9c5f7
10 files changed
tree: b6ddec308ee5b78a70ce99b77af907d9f983e92a
  1. app/
  2. doc/
  3. include/
  4. libs/
  5. sample/
  6. tests/
  7. tools/