Merge "Add multithreads throughput benchmark" into main am: 9ac6169db4

Original change: https://android-review.googlesource.com/c/platform/bionic/+/2645428

Change-Id: I146f094a170667a183545d9a54a43f0b52c3d6d8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>