Add libnettestutils as a networking test utility

The library provides a helper function that can retrieve dumpsys
results from a specific service. It can also take dumpsys arguments.

Bug: 29761778
Bug: 202086915
Test: test in Ib4aeb385ab80187feb39b659274a0aee20a4a5ed

Change-Id: Ib2ab8b6e4136bd3cbc52b025e53a1fa0c4e91709
diff --git a/staticlibs/native/nettestutils/Android.bp b/staticlibs/native/nettestutils/Android.bp
new file mode 100644
index 0000000..4fa367d
--- /dev/null
+++ b/staticlibs/native/nettestutils/Android.bp
@@ -0,0 +1,28 @@
+// 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_library_static {
+    name: "libnettestutils",
+    export_include_dirs: ["include"],
+    srcs: ["DumpService.cpp"],
+
+    shared_libs: [
+        "libbinder",
+        "libutils",
+    ],
+    cflags: [
+        "-Werror",
+        "-Wall",
+    ],
+}