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

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

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I9edefe1e8f6e49e8f1a1e3e6df15a02b6822af0e