Track libcore commit 85d69e16fe1e59e50c1ad228e754abf325088362.

Unhide Pattern.UNICODE_CHARACTER_CLASS.

(cherry picked from commit c55d9e767a2ddaced89f4528ce0fce4f2f89357e)

Change-Id: I5c53d8db13948c5d143c05694f49872456c260eb
2 files changed