Added empty subscription manager service am: a37efb74

Original change: https://android-review.googlesource.com/c/platform/frameworks/opt/telephony/+/2456072



Change-Id: I4978d30b5600543ea4852dd5c98fb0e39e9a263e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>