wifi - Add sepolicy for wifi_sniffer

Bug: 151402822
Test: wifi_sniffer is workable
Change-Id: Ie41d2caf676e3c3b24edce9061577b92c3023b05
diff --git a/wifi_sniffer/file.te b/wifi_sniffer/file.te
new file mode 100644
index 0000000..667d334
--- /dev/null
+++ b/wifi_sniffer/file.te
@@ -0,0 +1 @@
+type sysfs_wifi_conmode, sysfs_type, fs_type;