switch TelecomManager List getters to ParceledListSlice am: 9f8c770945

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/Telecomm/+/19322655

Change-Id: I69c1c393d13355737670b485f279143a419d39d2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>