root first, then run below command and then you can run as system with system_app context “context=u:r:system_app:s0″
runcon u:r:system_app:s0 su system
root first, then run below command and then you can run as system with system_app context “context=u:r:system_app:s0″
runcon u:r:system_app:s0 su system