Merge "SurfaceFlingerPerfTests: Reduce variability in results" into tm-qpr-dev am: 1eec52e6e1

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20056785

Change-Id: I0a593a4a6682245273a9db617f0136d0588e1caf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>