Merge "simpleperf: update doc for supporting ETM in the kernel." am: 43ccc71e3d am: ab47ce778e am: a4e62a8cdf

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

Change-Id: I66a4ba29a34d79543b0508657f3e9ccf2d96c936
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>