switch TelecomManager List getters to ParceledListSlice am: 960147d4bb

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/Telecomm/+/19300198

Change-Id: I986a1a361a132fbeac447385f478c79642458aa7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>