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: dc485593 am: b8663ec2 am: 3f2dfe40

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



Change-Id: If1601c885a4ec20e750ea30bd0104e8966a594d6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>