Merge "Revert "simpleperf: change default aux buffer size to 1M."" am: 5bfafafa2e am: 0b10220fee

Original change: https://android-review.googlesource.com/c/platform/system/extras/+/2029307

Change-Id: I2296c5d8de4a80b4d368ee36b0a4ca4cea24a0e6