Merge "Fix issue where disconnect cause notification does not fire." into rvc-dev am: 73e9d62d am: 31d788a7

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/opt/telephony/+/11762949

Change-Id: Ib6159bb09fd0a1236dc3923f8ba8d52927f4d39e