Merge "Enhance logs and cleanup removed connections." into tm-dev am: ad3dddb3 am: 47c32826

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



Change-Id: Ibee4159572af92d114ae7d25870bc10ad113dece
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>