Revert "Change cts tests to use InstrumentationTestRunner."

This reverts commit 665f512ebc9b376e8ca503bdfa77d656c914b0f0.
diff --git a/tests/cts/net/AndroidManifest.xml b/tests/cts/net/AndroidManifest.xml
index 6c2dfbd..a1f632e 100644
--- a/tests/cts/net/AndroidManifest.xml
+++ b/tests/cts/net/AndroidManifest.xml
@@ -22,7 +22,7 @@
         <uses-library android:name="android.test.runner" />
     </application>
 
-    <instrumentation android:name="android.test.InstrumentationTestRunner"
+    <instrumentation android:name="android.test.InstrumentationCtsTestRunner"
                      android:targetPackage="com.android.cts.stub"
                      android:label="CTS tests of android.net"/>