Fix ConnectivityManagerTest

Fixes: 72455858
Test: ensure bug fixed
Change-Id: I843cb0f15389472a81f61d5c0b5814423c231fe4
diff --git a/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java b/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
index 754e4f6..b2a152b 100644
--- a/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
+++ b/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
@@ -607,10 +607,10 @@
             Log.i(TAG, "testConnectivityChanged_manifestRequestOnlyPreN_shouldReceiveIntent cannot execute unless device supports WiFi");
             return;
         }
-        Intent startIntent = new Intent();
-        startIntent.setComponent(new ComponentName("android.net.cts.appForApi23",
-                "android.net.cts.appForApi23.ConnectivityListeningActivity"));
-        mContext.startActivity(startIntent);
+        mContext.startActivity(new Intent()
+                .setComponent(new ComponentName("android.net.cts.appForApi23",
+                        "android.net.cts.appForApi23.ConnectivityListeningActivity"))
+                .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK));
         Thread.sleep(200);
 
         toggleWifi();