WifiSettings: Add default service for @hide API

The vendor value adds with @SystemApi annotations are migrated
to use only @hide api. This CL is to allow access to @hide APIs
through "framework-wifi-vendor-hide-access-defaults"

Change-Id: I3d8e9d1079eb1159c9bcd74ed8864c3d850eb626
CRs-Fixed: 2682962
diff --git a/Android.bp b/Android.bp
index 3d60a85..33efe4e 100644
--- a/Android.bp
+++ b/Android.bp
@@ -25,6 +25,7 @@
     defaults: [
         "SettingsLibDefaults",
         "SettingsLib-search-defaults",
+        "framework-wifi-vendor-hide-access-defaults",
     ],
 
     srcs: ["src/**/*.java"],