Add native coverage listener to tethering coverage test

This allows the coverage tests to manually trigger native coverage
collection, as a workaround for collection not being triggered
automatically by the coverage infrastructure.

Bug: 185202279
Test: atest TetheringCoverageTests
Change-Id: I619fc267cf1743dd2218e3dd42546b0d4e9da193
diff --git a/Tethering/tests/integration/AndroidTest_Coverage.xml b/Tethering/tests/integration/AndroidTest_Coverage.xml
index 3def209..33c5b3d 100644
--- a/Tethering/tests/integration/AndroidTest_Coverage.xml
+++ b/Tethering/tests/integration/AndroidTest_Coverage.xml
@@ -8,5 +8,6 @@
         <option name="package" value="com.android.networkstack.tethering.tests.coverage" />
         <option name="runner" value="androidx.test.runner.AndroidJUnitRunner" />
         <option name="hidden-api-checks" value="false"/>
+        <option name="device-listeners" value="com.android.modules.utils.testing.NativeCoverageHackInstrumentationListener" />
     </test>
-</configuration>
\ No newline at end of file
+</configuration>