Verify bypassability in the VPN network capabilities

Bug: 256775913
Test: atest FrameworksNetTests
Change-Id: I6600714e5fc7c5d78fa7b8bb29c0c8840ec69637

tests/unit/java/com/android/server/connectivity/VpnTest.java

@@ -1853,6 +1853,7 @@ public class VpnTest extends VpnTestBase {
 
         // Check if allowBypass is set or not.
         assertTrue(nacCaptor.getValue().isBypassableVpn());
+        assertTrue(((VpnTransportInfo) ncCaptor.getValue().getTransportInfo()).getBypassable());
 
         return new PlatformVpnSnapshot(vpn, nwCb, ikeCb, childCb);
     }