Add APN for EMOBILE (Japan)

Change-Id: I23d633ea650d409634e6547fbd8e98871600fd63
(cherry picked from commit ed17843d0116b6816123371cc6fe44b7fa8c7f9b)
Clean up APNs for au and SoftBank (Japan)

Change-Id: I67223792af2abee5c9372cbe47745dbfa6b525a6
(cherry picked from commit 4ff854fc61b4193e6d37c2bdb45ebc61404d2101)