Merge "Add CTS for NetworkAgentConfig#setSubscriberId" into sc-dev am: 323a05334b am: 310be1f034 am: 289a99a7a6

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/14639705

Change-Id: I1768e614b158f46e57ac79864c5ba982fdafbc7f