Skip unsupported hardware for testB141603906

Bug: 168748249
Fix: 168748249
Test: local cts passed.
Change-Id: I8af0d5f9716a510322b2bfb0cdf6f05f94b12604
diff --git a/tests/cts/hostside/app/src/com/android/cts/net/hostside/VpnTest.java b/tests/cts/hostside/app/src/com/android/cts/net/hostside/VpnTest.java
index a451ea8..d312f18 100755
--- a/tests/cts/hostside/app/src/com/android/cts/net/hostside/VpnTest.java
+++ b/tests/cts/hostside/app/src/com/android/cts/net/hostside/VpnTest.java
@@ -1009,6 +1009,9 @@
     }
 
     public void testB141603906() throws Exception {
+        if (!supportedHardware()) {
+            return;
+        }
         final InetSocketAddress src = new InetSocketAddress(0);
         final InetSocketAddress dst = new InetSocketAddress(0);
         final int NUM_THREADS = 8;