(bug 45345) Run mapped code through wfBCP47()

As suggested by Niklas in Change-Id:
Id125a06815e47ad3e09a6269191e43132e265b10

Bug: 45345
Change-Id: I0ef0bbf8b2b154c5554ee86990ce17afab4c8b76
Merge "(bug 45345) Run mapped code through wfBCP47()"