Merge "simpleperf: fix format in README.md." am: 6f80f3fa73 am: f593c6cbb5 am: 1e81235a40

Original change: https://android-review.googlesource.com/c/platform/system/extras/+/1927564

Change-Id: I2c1a54f5a8c6ea61ce9c1e18a63f1117fff66ea8