Merge "simpleperf: Fix calculation of lost sample percentage in userspace" am: 905c121a88

Original change: https://android-review.googlesource.com/c/platform/system/extras/+/2545490

Change-Id: Icae7cff203a5031b2bb4abe6efa5ce3dbbd8f7b5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>