Remove unnecessary string copies from "PrintError". am: 7614170cfc am: b5f7d7da55 am: a97bcb90fd

Original change: https://android-review.googlesource.com/c/platform/system/testing/gtest_extras/+/2626395

Change-Id: I8729778f51e75e5d92eb95d859ff38145bbff3ca
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>