Create net-utils-services-common-srcs

...in order to allow "services.net-module-wifi" to
use it.

Bug: 171330443
Test: compiles
Change-Id: I67300429e1a95344c2287ec0358c94c651d2f9f9
diff --git a/staticlibs/Android.bp b/staticlibs/Android.bp
index 08febfe..4d842ef 100644
--- a/staticlibs/Android.bp
+++ b/staticlibs/Android.bp
@@ -134,10 +134,20 @@
     ]
 }
 
+filegroup {
+    name: "net-utils-services-common-srcs",
+    srcs: [
+        "device/android/net/NetworkFactory.java",
+    ],
+    visibility: [
+        "//frameworks/base/services/net",
+    ],
+}
+
 java_library {
     name: "net-utils-services-common",
     srcs: [
-        "device/android/net/NetworkFactory.java",
+        ":net-utils-services-common-srcs",
         ":framework-annotations",
     ],
     sdk_version: "system_current",