Allow wpa_supplicant to access KeyStore2

Bug: 171305388
Test: manual
Change-Id: I98134c41a4923bccf06c14858603fe888ec84633
diff --git a/public/hal_wifi_supplicant.te b/public/hal_wifi_supplicant.te
index 5fbe9f2..77a3317 100644
--- a/public/hal_wifi_supplicant.te
+++ b/public/hal_wifi_supplicant.te
@@ -20,6 +20,7 @@
 allowxperm hal_wifi_supplicant self:packet_socket ioctl { unpriv_sock_ioctls priv_sock_ioctls unpriv_tty_ioctls };
 
 use_keystore(hal_wifi_supplicant)
+binder_use(hal_wifi_supplicant_server)
 
 # Allow the WI-FI HAL to use keys in the keystore namespace wifi_key.
 allow hal_wifi_supplicant wifi_key:keystore2_key {