Merge "Add hidden API to support allowed networks reason" into rvc-dev am: 8d26aeb27f am: c9232b3376

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/Telephony/+/11715884

Change-Id: Ib4fe08911b2b70247b1888941e69db2c521d5e79