Assign ownership for unowned open sourced robolectric tests in fbandroid

Summary: Changelog: [Internal]

Reviewed By: IanChilds

Differential Revision: D22983828

fbshipit-source-id: d0f48760d7a96cfe290ef44addacaf2c0f712b65

ReactAndroid/src/test/java/com/facebook/react/util/BUCK

@@ -3,6 +3,8 @@ load("//tools/build_defs/oss:rn_defs.bzl", "react_native_dep", "react_native_tar
 rn_robolectric_test(
     name = "util",
     srcs = glob(["**/*.java"]),
+    # Please change the contact to the oncall of your team
+    contacts = ["oncall+test_ownership_2020@xmail.facebook.com"],
     visibility = [
         "PUBLIC",
     ],