wifi: Add sepolicy rules for wifi_sniffer

avc: denied { net_raw } for capability=1
scontext=u:r:wifi_sniffer:s0
tcontext=u:r:wifi_sniffer:s0
tclass=capability permissive=0

Bug: 151286568
Test: wifi_sniffer is workable
Change-Id: Ia32ec4149d58fccc710f0b54b164ca4d654b0952
1 file changed