Introduce system API for ActivityManager.updateMccMncConfiguration for Mainline

Test: treehugger
Bug: 147381728
Bug: 138545688
Change-Id: Ieef1dbbab3b05fc166c3dbc53ed2507ef45d09d7
Merged-In: Ieef1dbbab3b05fc166c3dbc53ed2507ef45d09d7
(cherry picked from commit b9c9bfa6e890f31960e07e649f310972545379d6)
4 files changed