[automerge] switch TelecomManager List getters to ParceledListSlice 2p: deec8016b2 am: a9eaf09f33

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/Telecomm/+/19370567

Change-Id: I20b3016e335f29946e9005f38d056538c0c95bd3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>