Fix SMSSendConfirmationCheck so that it doesnt fail on tablets or tv's

Skip the test for any device that doesn't have telephony service.
Bug: 31684410

Change-Id: If9bc5c2e2db5d6ca05593736c8d2eb6fc2fedc47
diff --git a/tests/tests/smssendconfirmationcheck/src/android/smssendconfirmationcheck/cts/SMSSendConfirmationCheck.java b/tests/tests/smssendconfirmationcheck/src/android/smssendconfirmationcheck/cts/SMSSendConfirmationCheck.java
index c776050..7d928bd 100755
--- a/tests/tests/smssendconfirmationcheck/src/android/smssendconfirmationcheck/cts/SMSSendConfirmationCheck.java
+++ b/tests/tests/smssendconfirmationcheck/src/android/smssendconfirmationcheck/cts/SMSSendConfirmationCheck.java
@@ -17,10 +17,12 @@
 package android.smssendconfirmationcheck.cts;
 
 import android.content.ContentResolver;
+import android.content.Context;
 import android.database.Cursor;
 import android.net.Uri;
 import android.os.SystemClock;
 import android.telephony.SmsManager;
+import android.telephony.TelephonyManager;
 import android.test.AndroidTestCase;
 
 public class SMSSendConfirmationCheck extends AndroidTestCase {
@@ -28,10 +30,16 @@
     /*
      * The following method tries to send a short code SMS via default SMS API (silently). If
      * the message is sent (no confirmation displayed to user), the SMS db size will not
-     * match the previous db size.
+     * match the previous db size.  If SMS is not capable on the device (i.e. a tablet or tv)
+     * this test will always pass.
      */
 
     public void testSMSSendingExploit() throws Exception {
+        TelephonyManager telephonyManager =
+            (TelephonyManager) getContext().getSystemService(Context.TELEPHONY_SERVICE);
+        if(!telephonyManager.isSmsCapable()) {
+            return;
+        }
         int inboxSizeBeforeExploit = getSMSInboxSize();
         SmsManager manager = SmsManager.getDefault();
         manager.sendTextMessage("25578", null, "STOP", null, null);