Merge "Enhance logs and cleanup removed connections." into tm-dev am: ad3dddb3 am: c201c73e

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/opt/telephony/+/17623304



Change-Id: I75ce3529e0a28392db5d91a865e8fc1e2fee9ccc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>