Merge "Remove legacy subscription code" into udc-dev am: 1c414978

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/opt/telephony/+/22657349



Change-Id: Icb5bf57dd9e68ed6402e694b98a0c65663a3dfaf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>