Merge "simpleperf: Check if ETMDecoder is created." am: dd06e01bd0

Original change: https://android-review.googlesource.com/c/platform/system/extras/+/2389433

Change-Id: I99966efed356f64a6f2d3b54cbc26323818cc736
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>