Add assertion messages to testStartUsingNetworkFeature_enableHipri.

testStartUsingNetworkFeature_enableHipri should be able to reconnect to Wifi Network.
Added a prefix to the already defined error message to rerun the test.

The ConnectivityManager's startUsingNetworkFeature will fail without SIM card and/or signal.
Changed the error message to check SIM card and signal and rerun the test.

Bug: 28264205
Change-Id: Ia1b35cab11afa65ae93ea7dab2f7cc3a330d8471
diff --git a/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java b/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
index 9daf3c4..120f998 100644
--- a/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
+++ b/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
@@ -283,7 +283,8 @@
             assertTrue("Couldn't start using the HIPRI feature.", result != -1);
 
             // Check that the ConnectivityManager reported that it connected using hipri...
-            assertTrue("Couldn't connect using hipri...", receiver.waitForConnection());
+            assertTrue("[RERUN] Couldn't connect using hipri. Check signal and SIM.",
+                    receiver.waitForConnection());
 
             assertTrue("Couldn't requestRouteToHost using HIPRI.",
                     mCm.requestRouteToHost(ConnectivityManager.TYPE_MOBILE_HIPRI, HOST_ADDRESS));
@@ -311,7 +312,7 @@
         mContext.registerReceiver(receiver, filter);
 
         assertTrue(mWifiManager.setWifiEnabled(true));
-        assertTrue("Wifi must be configured to connect to an access point for this test.",
+        assertTrue("[RERUN] Wifi must be configured to connect to an access point for this test.",
                 receiver.waitForConnection());
 
         mContext.unregisterReceiver(receiver);