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

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

Bug: 236263294
Change-Id: I5f50050132ea48197686e7bc95d308777ea50712
Merged-In: Ibc3814dabd59cf9f0f9505b88f2146a4c3c5e015