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

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



Change-Id: Ia61350472f0bc53cd0cd248994d5b4c0f2774498
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>