Merge "Add mmap syscall benchmarks" into main am: 706e228154

Original change: https://android-review.googlesource.com/c/platform/bionic/+/2715842

Change-Id: I48462a1c049b8c1d7d9feeec97f7107f0f2161ac
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>