Merge "Don't send null data call list response" into tm-dev am: 60643f51 am:...

Merge "Don't send null data call list response" into tm-dev am: 60643f51 am: 4a3ce890 am: 57801815 am: e8c6dbc8

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/opt/telephony/+/17982015



Change-Id: Ifc77b1f70a86a4aa9f7ebf4c95fe233c949cc937
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>