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: Ibd394402df8514a9ae8e0bebf3a595591d10959e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>