Add resolv_unit_test_config.xml for mts

MTS can't find the multiarch test binary correctly.
This xml file is used to let MTS know which test binary should be took.
It is a temporary solution, hopefully we can get rid of the xml soon.

Bug: 151122604
Test: forrest
Change-Id: I45e45912f91e8d78891a8658f9f2e27c7e6252da
diff --git a/Android.bp b/Android.bp
index b54cf1d..cd659d8 100644
--- a/Android.bp
+++ b/Android.bp
@@ -178,6 +178,7 @@
     name: "resolv_unit_test",
     test_suites: ["device-tests", "mts"],
     require_root: true,
+    test_config: "resolv_unit_test_config.xml",
     //TODO:  drop root privileges and make it be an real unit test.
     defaults: ["netd_defaults"],
     srcs: [
diff --git a/resolv_unit_test_config.xml b/resolv_unit_test_config.xml
new file mode 100644
index 0000000..feafea1
--- /dev/null
+++ b/resolv_unit_test_config.xml
@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2020 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.
+-->
+<configuration description="Configuration for resolv unit tests">
+   <option name="test-suite-tag" value="mts" />
+   <target_preparer class="com.android.compatibility.common.tradefed.targetprep.FilePusher">
+       <option name="cleanup" value="true" />
+       <option name="push" value="resolv_unit_test->/data/local/tmp/resolv_unit_test" />
+       <option name="append-bitness" value="true" />
+   </target_preparer>
+   <target_preparer class="com.android.tradefed.targetprep.RootTargetPreparer"/>
+   <test class="com.android.tradefed.testtype.GTest" >
+       <option name="native-test-device-path" value="/data/local/tmp" />
+       <option name="module-name" value="resolv_unit_test" />
+       <option name="runtime-hint" value="10m" />
+       <!-- test-timeout unit is ms, value = 10 min -->
+       <option name="native-test-timeout" value="600000" />
+   </test>
+</configuration>