Add wifi-service to PRODUCT_PACKAGES.

Bug: 13622394
Change-Id: Ifa186db4b804bcb123b26324978c7a1ad986c1e2
diff --git a/target/product/core_minimal.mk b/target/product/core_minimal.mk
index be875a9..e13e59b 100644
--- a/target/product/core_minimal.mk
+++ b/target/product/core_minimal.mk
@@ -60,7 +60,8 @@
     sensorservice \
     uiautomator \
     uncrypt \
-    webview
+    webview \
+    wifi-service
 
 # The order of PRODUCT_BOOT_JARS matters.
 PRODUCT_BOOT_JARS := \