Added unit tests am: 7b74471c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/opt/telephony/+/21975588



Change-Id: Ia8d10c5f652d0067929fd64e964f218f7e8664a0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>