[Thread] add MainlineModuleController for ThreadNetwotkUnitTests

Per comment in https://android-review.git.corp.google.com/c/platform/test/mts/+/2930711/comment/a88f14b1_a2fb9841/

Bug: 322142548
Change-Id: Id87c9f20be31cbead2062c08addc5995df143896

thread/tests/unit/AndroidTest.xml

@@ -19,6 +19,18 @@
     <option name="test-tag" value="ThreadNetworkUnitTests" />
     <option name="test-suite-tag" value="apct" />
 
+    <!--
+        Only run tests if the device under test is SDK version 34 (Android 14) or above.
+    -->
+    <object type="module_controller"
+            class="com.android.tradefed.testtype.suite.module.Sdk34ModuleController" />
+
+    <!-- Run tests in MTS only if the Tethering Mainline module is installed. -->
+    <object type="module_controller"
+            class="com.android.tradefed.testtype.suite.module.MainlineTestModuleController">
+        <option name="mainline-module-package-name" value="com.google.android.tethering" />
+    </object>
+
     <target_preparer class="com.android.tradefed.targetprep.suite.SuiteApkInstaller">
         <option name="test-file-name" value="ThreadNetworkUnitTests.apk" />
         <option name="check-min-sdk" value="true" />