Merge "libprocessgroup: Proceed if activation of an optional controller fails"...

Merge "libprocessgroup: Proceed if activation of an optional controller fails" am: 05c7e3c0 am: 850bac57 am: 7191e510

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2424613



Change-Id: I77c9be65b68b576129434a560c1a08eeac292f35
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>