Merge "[RCS]Set missing MSRP headers when sending a message." am: 65b0535889 am: ba355698a0 am: 589b0d79fb

Original change: https://android-review.googlesource.com/c/platform/packages/services/Telephony/+/1576987

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I320650b22ec6f3f4fc7056d1363195f7e9c78f96