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

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

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



Change-Id: I24ffb5f94c1d35f912760c97813a46f6b324bdf4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>