android-interop-testing: update androidTest/AndroidManifest.xml for multidex
diff --git a/android-interop-testing/src/androidTest/AndroidManifest.xml b/android-interop-testing/src/androidTest/AndroidManifest.xml
index 916a1c0..9c59d20 100644
--- a/android-interop-testing/src/androidTest/AndroidManifest.xml
+++ b/android-interop-testing/src/androidTest/AndroidManifest.xml
@@ -6,8 +6,8 @@
         android:name="androidx.test.runner.AndroidJUnitRunner"
         android:targetPackage="io.grpc.android.integrationtest" />
 
-    <application android:debuggable="true" >
-        <uses-library android:name="android.test.runner" />
+    <application
+        android:name="android.support.multidex.MultiDexApplication" >
     </application>
 
 </manifest>