[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: I2d72365bf3d489f626a229ad6873a03883983e2b
Merged-In: Ibc3814dabd59cf9f0f9505b88f2146a4c3c5e015