Avoid unnecessary copy of clientId and serviceTraceMeta
Avoid unnecessary copy of clientId and serviceTraceMeta

Summary:
This opportunity was found with the combination of [Infer's PULSE_UNNECESSARY_COPY analysis and Strobelight cycle counts](https://fb.workplace.com/groups/infer.eng/permalink/970566283876913/).

This shows up as one of the top issues ordered by inclusive cycle counts across the whole fleet (D33790780) with
 - **299,045,658,300**  cycles based on the line number for `clientId`
- **191,061,535,300**  cycles based on the line number for `serviceTraceMeta`

Reviewed By: yfeldblum

Differential Revision: D35649462

fbshipit-source-id: a1ba52da2f76d4e5a6277a039ef31eacf26637c1

facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift