Merge "simpleperf: update doc for supporting ETM in the kernel." am: 43ccc71e3d

Original change: https://android-review.googlesource.com/c/platform/system/extras/+/2050287

Change-Id: If063512182204663ffabfbe1475bf600731c610f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>