Unhide Pattern.UNICODE_CHARACTER_CLASS. (cherry picked from commit c55d9e767a2ddaced89f4528ce0fce4f2f89357e) Change-Id: I5c53d8db13948c5d143c05694f49872456c260eb
Unhide Pattern.UNICODE_CHARACTER_CLASS. (cherry picked from commit c55d9e767a2ddaced89f4528ce0fce4f2f89357e) Change-Id: I5c53d8db13948c5d143c05694f49872456c260eb