Add getSlotsMapping to TelephonyManager

Bug: 123101769
Test: build
Merged-In: I416d741947b1a15e66ebf71b8104c4b2ec95e310
Change-Id: I416d741947b1a15e66ebf71b8104c4b2ec95e310
(cherry picked from commit 83e7b920deec8d163c3ddd9c56343ce8bcea0a9e)
3 files changed