Adding API in TelephonyManger for updating Fplmns.

Bug: 78790236
Test: Verified on blueline
Change-Id: Id19ae55cc03efbd085314e9d0026ca2486e9755d
Merged-In: Id19ae55cc03efbd085314e9d0026ca2486e9755d
(cherry picked from commit c245257cb1327c3719b5039ba5b0284f9573a8a0)
5 files changed