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

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

Change-Id: I75c29bc7b3e0d22f9cfddb3b49fe86488ed2517d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>