Merge "simpleperf: refactor code setting sample rate" into main am: 93b31092e2

Original change: https://android-review.googlesource.com/c/platform/system/extras/+/2789675

Change-Id: I9cf1738b293eecd7beffa3cc9df78ba083846f63
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>