Merge "simpleperf: update release process doc." am: 90932b3835 am: 2eb9c78d54 am: 10bbb1be4c

Original change: https://android-review.googlesource.com/c/platform/system/extras/+/1802762

Change-Id: I3bfe38f9b49e8f5a76701d3cf969f1e02f855cc7