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: c892db0c

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



Change-Id: I803ffe9a92858221c29f84e20aac70720a93e969
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>