Reinstate new VPN uid filtering unit tests

Mock out PackageManager and returns correct information corresponding
to the test app package itself.

Test: atest --generate-new-metrics 10 com.android.server.ConnectivityServiceTest
Bug: 114231106
Bug: 130397860
Change-Id: Ib921700eda417f411d7a2c77c1140fba9ab50bbb

tests/net/java/com/android/server/ConnectivityServiceTest.java

@@ -16,6 +16,8 @@
 
 package com.android.server;
 
+import static android.content.pm.PackageManager.GET_PERMISSIONS;
+import static android.content.pm.PackageManager.MATCH_ANY_USER;
 import static android.net.ConnectivityManager.CONNECTIVITY_ACTION;
 import static android.net.ConnectivityManager.NETID_UNSET;
 import static android.net.ConnectivityManager.PRIVATE_DNS_MODE_OFF;
@@ -103,6 +105,7 @@ import android.content.Intent;
 import android.content.IntentFilter;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
 import android.content.pm.UserInfo;
 import android.content.res.Resources;
 import android.net.ConnectivityManager;
@@ -146,6 +149,7 @@ import android.net.metrics.IpConnectivityLog;
 import android.net.shared.NetworkMonitorUtils;
 import android.net.shared.PrivateDnsConfig;
 import android.net.util.MultinetworkPolicyTracker;
+import android.os.Binder;
 import android.os.ConditionVariable;
 import android.os.Handler;
 import android.os.HandlerThread;
@@ -272,6 +276,7 @@ public class ConnectivityServiceTest {
     @Mock IDnsResolver mMockDnsResolver;
     @Mock INetd mMockNetd;
     @Mock NetworkStackClient mNetworkStack;
+    @Mock PackageManager mPackageManager;
     @Mock UserManager mUserManager;
 
     private ArgumentCaptor<ResolverParamsParcel> mResolverParamsParcelCaptor =
@@ -357,6 +362,11 @@ public class ConnectivityServiceTest {
         public Resources getResources() {
             return mResources;
         }
+
+        @Override
+        public PackageManager getPackageManager() {
+            return mPackageManager;
+        }
    }
 
     public void waitForIdle(int timeoutMsAsInt) {
@@ -1232,6 +1242,7 @@ public class ConnectivityServiceTest {
         if (Looper.myLooper() == null) {
             Looper.prepare();
         }
+        mockDefaultPackages();
 
         FakeSettingsProvider.clearSettingsProvider();
         mServiceContext = new MockContext(InstrumentationRegistry.getContext(),
@@ -1284,6 +1295,23 @@ public class ConnectivityServiceTest {
         FakeSettingsProvider.clearSettingsProvider();
     }
 
+    private void mockDefaultPackages() throws Exception {
+        final String testPackageName = mContext.getPackageName();
+        final PackageInfo testPackageInfo = mContext.getPackageManager().getPackageInfo(
+                testPackageName, PackageManager.GET_PERMISSIONS);
+        when(mPackageManager.getPackagesForUid(Binder.getCallingUid())).thenReturn(
+                new String[] {testPackageName});
+        when(mPackageManager.getPackageInfoAsUser(eq(testPackageName), anyInt(),
+                eq(UserHandle.getCallingUserId()))).thenReturn(testPackageInfo);
+
+        when(mPackageManager.getInstalledPackages(eq(GET_PERMISSIONS | MATCH_ANY_USER))).thenReturn(
+                Arrays.asList(new PackageInfo[] {
+                        buildPackageInfo(/* SYSTEM */ false, APP1_UID),
+                        buildPackageInfo(/* SYSTEM */ false, APP2_UID),
+                        buildPackageInfo(/* SYSTEM */ false, VPN_UID)
+                }));
+    }
+
    private static int transportToLegacyType(int transport) {
         switch (transport) {
             case TRANSPORT_ETHERNET:
@@ -6169,7 +6197,6 @@ public class ConnectivityServiceTest {
     }
 
     @Test
-    @Ignore
     public void testFullyRoutedVpnResultsInInterfaceFilteringRules() throws Exception {
         LinkProperties lp = new LinkProperties();
         lp.setInterfaceName("tun0");
@@ -6196,7 +6223,6 @@ public class ConnectivityServiceTest {
     }
 
     @Test
-    @Ignore
     public void testLegacyVpnDoesNotResultInInterfaceFilteringRule() throws Exception {
         LinkProperties lp = new LinkProperties();
         lp.setInterfaceName("tun0");
@@ -6210,7 +6236,6 @@ public class ConnectivityServiceTest {
     }
 
     @Test
-    @Ignore
     public void testLocalIpv4OnlyVpnDoesNotResultInInterfaceFilteringRule()
             throws Exception {
         LinkProperties lp = new LinkProperties();
@@ -6226,7 +6251,6 @@ public class ConnectivityServiceTest {
     }
 
     @Test
-    @Ignore
     public void testVpnHandoverChangesInterfaceFilteringRule() throws Exception {
         LinkProperties lp = new LinkProperties();
         lp.setInterfaceName("tun0");
@@ -6276,7 +6300,6 @@ public class ConnectivityServiceTest {
     }
 
     @Test
-    @Ignore
     public void testUidUpdateChangesInterfaceFilteringRule() throws Exception {
         LinkProperties lp = new LinkProperties();
         lp.setInterfaceName("tun0");