Expand visibility of adjustLanguageCode.

There's already one copy in the frameworks (in the resource
system) and we will need to add another copy to the code that
sets system locales from the SIM.

(cherry picked from commit a29f321f2d347bfc0f0d7886fc74dcbbb4cd2432)

Change-Id: Ib2c48a4f5f1085080f62c7a4322d9da57bbeab41
1 file changed