Android 9 Custom Service crashes with clean AOSP build

Will you please try without adding this,

BOARD_KERNEL_CMDLINE += androidboot.selinux=permissive

with out this line BOARD_KERNEL_CMDLINE += androidboot.selinux=permissive
getting this error :
[ 1350.212500] init: Service 'usbmountd ’ (pid 6923) received signal 11
[ 1350.212626] init: Sending signal 9 to service 'usbmountd ’ (pid 6923) process group…
[ 1350.213261] libprocessgroup: Successfully killed process cgroup uid 0 pid 6923 in 0ms
[ 1350.213917] init: updatable process 'usbmountd ’ exited 4 times in 4 minutes
[ 1350.221191] init: Init cannot set ‘ro.init.updatable_crashing’ to ‘1’: Read-only property was already set

Can you please help me to verify , I have added service in init.rc properly ??

on property:dev.bootcomplete=1
start yyyyy
exec - root root vendor – /vendor/bin/yyyyy
service yyyyy /vendor/bin/yyyyy
class main
user root
oneshot
group root system
disabled
oneshot
seclabel u:r:yyyyy:s0