In running the official omni-9-20190203 ROM for potter, and getting the following audit messages via logcat. The uid of 10040 is the bundled com.android.contacts system app.
02-09 17:27:30.212 2653 2653 W main : type=1400 audit(0.0:3053): avc: denied { read } for uid=10040 name="u:object_r:bg_boot_complete_prop:s0" dev="tmpfs" ino=14076 scontext=u:r:priv_app:s0:c512,c768 tcontext=u:object_r:bg_boot_complete_prop:s0 tclass=file permissive=0
02-09 17:27:30.212 2653 2653 W main : type=1400 audit(0.0:3054): avc: denied { read } for uid=10040 name="u:object_r:bg_daemon_prop:s0" dev="tmpfs" ino=14077 scontext=u:r:priv_app:s0:c512,c768 tcontext=u:object_r:bg_daemon_prop:s0 tclass=file permissive=0
02-09 17:27:30.212 2653 2653 W main : type=1400 audit(0.0:3055): avc: denied { read } for uid=10040 name="u:object_r:bluetooth_prop:s0" dev="tmpfs" ino=14078 scontext=u:r:priv_app:s0:c512,c768 tcontext=u:object_r:bluetooth_prop:s0 tclass=file permissive=0
02-09 17:27:30.212 2653 2653 W main : type=1400 audit(0.0:3056): avc: denied { read } for uid=10040 name="u:object_r:bootloader_boot_reason_prop:s0" dev="tmpfs" ino=14079 scontext=u:r:priv_app:s0:c512,c768 tcontext=u:object_r:bootloader_boot_reason_prop:s0 tclass=file permissive=0
02-09 17:27:30.212 2653 2653 W main : type=1400 audit(0.0:3057): avc: denied { read } for uid=10040 name="u:object_r:boottime_prop:s0" dev="tmpfs" ino=14080 scontext=u:r:priv_app:s0:c512,c768 tcontext=u:object_r:boottime_prop:s0 tclass=file permissive=0
In running the official omni-9-20190203 ROM for potter, and getting the following audit messages via logcat. The uid of 10040 is the bundled com.android.contacts system app.
02-09 17:27:30.212 2653 2653 W main : type=1400 audit(0.0:3053): avc: denied { read } for uid=10040 name="u:object_r:bg_boot_complete_prop:s0" dev="tmpfs" ino=14076 scontext=u:r:priv_app:s0:c512,c768 tcontext=u:object_r:bg_boot_complete_prop:s0 tclass=file permissive=0 02-09 17:27:30.212 2653 2653 W main : type=1400 audit(0.0:3054): avc: denied { read } for uid=10040 name="u:object_r:bg_daemon_prop:s0" dev="tmpfs" ino=14077 scontext=u:r:priv_app:s0:c512,c768 tcontext=u:object_r:bg_daemon_prop:s0 tclass=file permissive=0 02-09 17:27:30.212 2653 2653 W main : type=1400 audit(0.0:3055): avc: denied { read } for uid=10040 name="u:object_r:bluetooth_prop:s0" dev="tmpfs" ino=14078 scontext=u:r:priv_app:s0:c512,c768 tcontext=u:object_r:bluetooth_prop:s0 tclass=file permissive=0 02-09 17:27:30.212 2653 2653 W main : type=1400 audit(0.0:3056): avc: denied { read } for uid=10040 name="u:object_r:bootloader_boot_reason_prop:s0" dev="tmpfs" ino=14079 scontext=u:r:priv_app:s0:c512,c768 tcontext=u:object_r:bootloader_boot_reason_prop:s0 tclass=file permissive=0 02-09 17:27:30.212 2653 2653 W main : type=1400 audit(0.0:3057): avc: denied { read } for uid=10040 name="u:object_r:boottime_prop:s0" dev="tmpfs" ino=14080 scontext=u:r:priv_app:s0:c512,c768 tcontext=u:object_r:boottime_prop:s0 tclass=file permissive=0