Merge "[RCS]Add getEncodedMessage() in SipMessage.java" am: 725e04e4f1 am: d5253e5321

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1554295

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ic6272bf2debe4430ac9cde2e2a7a85f7f943ee62