Merge "mmap-perf: Remove use of hardcoded PAGE_SIZE 4096" into main am: b8af8d3a18 am: 89ecaee62c am: 9fc9108072 am: 3a89efc45c

Original change: https://android-review.googlesource.com/c/platform/system/extras/+/2700536

Change-Id: I04419b63b805d3edbe589e330dac8c8613301565
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>