Add a VpnTransportInfo object.

This currently stores the VPN type and a session name, but can be
extended in the future.

Bug: 173331190
Test: added coverage in VpnTest
Test: added coverage in ConnectivityServiceTest
Test: added coverage in NetworkAgentTest
Change-Id: I450858a9fa332c8d896dbdb4c14337d5ec23677f

tests/net/java/android/net/VpnTransportInfoTest.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import static com.android.testutils.ParcelUtils.assertParcelSane;
+import static com.android.testutils.ParcelUtils.assertParcelingIsLossless;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotEquals;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+@SmallTest
+public class VpnTransportInfoTest {
+
+    @Test
+    public void testParceling() {
+        VpnTransportInfo v = new VpnTransportInfo(VpnManager.TYPE_VPN_PLATFORM);
+        assertParcelSane(v, 1 /* fieldCount */);
+        assertParcelingIsLossless(v);
+    }
+
+    @Test
+    public void testEqualsAndHashCode() {
+        VpnTransportInfo v1 = new VpnTransportInfo(VpnManager.TYPE_VPN_PLATFORM);
+        VpnTransportInfo v2 = new VpnTransportInfo(VpnManager.TYPE_VPN_SERVICE);
+        VpnTransportInfo v3 = new VpnTransportInfo(VpnManager.TYPE_VPN_PLATFORM);
+        assertNotEquals(v1, v2);
+        assertEquals(v1, v3);
+        assertEquals(v1.hashCode(), v3.hashCode());
+    }
+}