The settings crash when it add the RTL mark on MEP message

The MEP message string is one line, so it did not need to add more
RTL marks.
hsv: https://hsv.googleplex.com/5694452275347456

Bug: 233082642
Test: manually test and take the hsv.
Change-Id: Iad4d469eb6a74805f3c8d5fe5c7eacea1e7a25d3