Merge "Optimize cgroupfs dumping" am: aee8706d8e am: 2f89e844e6 am: b9732397b0 am: e7b13cfa8c

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1936561

Change-Id: I5d8d5647b7e22d49b5ffc643431a77225f813d06