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

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

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I933862315c93bdc05bfee0e22e76c792b68d7664