Merge "Delete datagram from DB after receiving ack from all listeners." into...

Merge "Delete datagram from DB after receiving ack from all listeners." into udc-dev am: 8a79fadd am: e718e7c5

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/opt/telephony/+/22465488



Change-Id: I1e5c820255e3d30bc0d1a133bd059026cb7e3a87
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>