Merge "Send Empty packet in MSRP" am: b3291bb1f4 am: 724d3eabe8 am: 1873877922

Original change: https://android-review.googlesource.com/c/platform/packages/services/Telephony/+/1608753

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I82febc3029a19975d1e08506172c53df068a5369