Move wpa_supplicant.conf from /system to /vendor

In order to make generic system image, wpa_supplicant.conf is moved from
system to vendor partition. wpa_supplicant.conf is non-generic; it is
used by wpa_supplicant which is now part of wifi HAL.

Bug: 36015569
Test: confirm that wpa_supplicant.conf is under /vendor/etc/wifi and
wifi is working correctly.

Change-Id: I6dc62c650f7a012ea667d4323a6e0f5aee06ac12
diff --git a/wpa_supplicant/wpa_supplicant_conf.mk b/wpa_supplicant/wpa_supplicant_conf.mk
index 74986ea..4293976 100644
--- a/wpa_supplicant/wpa_supplicant_conf.mk
+++ b/wpa_supplicant/wpa_supplicant_conf.mk
@@ -16,7 +16,7 @@
 LOCAL_MODULE := wpa_supplicant.conf
 LOCAL_MODULE_CLASS := ETC
 LOCAL_MODULE_TAGS := optional
-LOCAL_MODULE_PATH := $(TARGET_OUT_ETC)/wifi
+LOCAL_MODULE_PATH := $(TARGET_OUT_VENDOR)/etc/wifi
 
 include $(BUILD_SYSTEM)/base_rules.mk