Follow API removal of LocaleList#getPrimary().

This follows up to a recent CL [1] that removed #getPrimary() method
from LocaleList class.

 [1] I75f77aea6b75e38793ed8477e5e5a4420d5e6d85
     fee44846376c212114223fc4259382921e6dca7a

Bug: 26984092
Change-Id: Ied4678d35c4dcb380ce24e9bce9336dbbf6c16b8
2 files changed