Merge "Reland "libprocessgroup: return false on failure"" am: 9c822b55 am:...

Merge "Reland "libprocessgroup: return false on failure"" am: 9c822b55 am: 6e70fe6d am: d5d67e4f am: 577a4b03 am: ee87c9b4

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2063432



Change-Id: Ic15d432eea4576a1d58f4c968e4e221d50294b54
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>