Move libwifi-hal and dependencies to /vendor

Bug: 34457880
Test: Device boots up and able to connect to wifi networks.
Change-Id: I7351e52d5baabeef4f57a6d0f606ada093dd2d67
diff --git a/bcmdhd/wifi_hal/Android.mk b/bcmdhd/wifi_hal/Android.mk
index ea19efd..9e4ed08 100644
--- a/bcmdhd/wifi_hal/Android.mk
+++ b/bcmdhd/wifi_hal/Android.mk
@@ -36,6 +36,7 @@
 	wifi_offload.cpp
 
 LOCAL_MODULE := libwifi-hal-bcm
+LOCAL_PROPRIETARY_MODULE := true
 
 include $(BUILD_STATIC_LIBRARY)