Merge "debuggerd: Use libprocessgroup to unfreeze" into main am: 58e219c12a

Original change: https://android-review.googlesource.com/c/platform/system/core/+/3395660

Change-Id: Ifb3d6547c6fac6e35d4ec4684b58de556300aeb6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>