Merge "Revert "simpleperf: change default aux buffer size to 1M."" am: 5bfafafa2e am: 0b10220fee am: aef7de7caf

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

Change-Id: I62bdc619061b9070c858aa1650cc8fd53cc45cd6