Merge "Kill its process group even if the given process is already dead" am:...

Merge "Kill its process group even if the given process is already dead" am: 763593e3 am: 2038ed86 am: f38b8818

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2459289



Change-Id: I22ddd859726d5a33a2f4bbc8e7fd1f12ba7cc2db
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>