Merge "libprocessgroup: fix boot time performance regression" am: e89ee18b9b am: 12f447e607 am: ab4821d3f2

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2467504

Change-Id: Ic391acf818e48a074984186c208085b7426cb0a7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>