Add libconnectivity_native_test_utils

The utility currently contains a firewall class that is used by DNS
resolver tests to block DNS packets.

Bug: 227159929
Test: atest resolv_integration_test
Change-Id: I5c5bc0b263a677f57cd63f002057ff0812f15e64
diff --git a/tests/native/utilities/Android.bp b/tests/native/utilities/Android.bp
new file mode 100644
index 0000000..7668cc1
--- /dev/null
+++ b/tests/native/utilities/Android.bp
@@ -0,0 +1,30 @@
+//
+// Copyright (C) 2022 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+cc_test_library {
+    name: "libconnectivity_native_test_utils",
+    defaults: [
+        "netd_defaults",
+        "resolv_test_defaults"
+    ],
+    srcs: [
+        "firewall.cpp",
+    ],
+    header_libs: [
+        "bpf_connectivity_headers",
+    ],
+    export_header_lib_headers: ["bpf_connectivity_headers"],
+    export_include_dirs: ["."],
+}