simpleperf: check perf event limit.

The property security.perf_harden is added in https://android-review.googlesource.com/#/c/233736/5. And simpleperf needs to notice that.

Bug: 29054680
Change-Id: I5f1593f5b389d182a56c4bf3bd438a1dc2b66686
(cherry picked from commit ebf79f3a65c81ef0f8cd7a3b875771be88157fcc)
8 files changed