Merge "procrank: add flag to filter descendants." am: cfad4b1ec6 am: 0bc5d7f55b

Original change: https://android-review.googlesource.com/c/platform/system/memory/libmeminfo/+/1861901

Change-Id: I25fcd4e3c5b64beaf65f3b1a3864512a7b84c42f