Add wifi util lib to classpath for wifi stubs

Fixes the individual wifi stubs to match those in the monolithic
current.txt.

Bug: 152857194
Test: diff <(cat api/system-current.txt | grep 'class RttManager {' -A30) \
           <(cat wifi/api/system-current.txt | grep 'class RttManager {' -A30) \
      && echo pass || echo fail
Change-Id: I3fc8a87e83f8dfee8d97966ead379d7acf0807bc
diff --git a/wifi/Android.bp b/wifi/Android.bp
index 6147861..c0a5e19 100644
--- a/wifi/Android.bp
+++ b/wifi/Android.bp
@@ -130,7 +130,10 @@
         ":framework-wifi-updatable-sources",
         ":framework-wifi-util-lib-aidls",
     ],
-    libs: [ "framework-annotations-lib" ],
+    libs: [
+        "framework-annotations-lib",
+        "framework-wifi-util-lib",
+    ],
     sdk_version: "module_current",
 }