use xplat BUCK attribution

Summary:
Internal code attribution update.

Changelog: [Internal]

Reviewed By: mdvacca

Differential Revision: D21603406

fbshipit-source-id: c3da1823e26beb0092d97e66d731618c0433a2f7

ReactAndroid/src/androidTest/java/com/facebook/react/testing/network/BUCK

@@ -3,7 +3,7 @@ load("//tools/build_defs/oss:rn_defs.bzl", "react_native_dep", "react_native_tar
 rn_android_library(
     name = "network",
     srcs = glob(["**/*.java"]),
-    labels = ["supermodule:android/default/public.react_native.infra"],
+    labels = ["supermodule:xplat/default/public.react_native.infra"],
     visibility = [
         "PUBLIC",
     ],