[Wi-Fi] Support WiFi detail page for OpenRoaming feature in AOSP setting.

Issue: Openroaming should have a specific detail page.
Solution: Apply the mock design to only reserve two preference items:
          1.Auto-connect
          2.Scription details

Bug: 146669261
Test: Add unit test case to test the new controller: WifiSubscriptionDetailPreferenceController2
Change-Id: Iba96500062f412f4cdcd1c8248544657770ab231

tests/robotests/src/com/android/settings/wifi/details2/WifiSubscriptionDetailPreferenceController2Test.java

@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2020 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 com.android.settings.wifi.details2;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+
+import com.android.wifitrackerlib.WifiEntry;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.RuntimeEnvironment;
+
+@RunWith(RobolectricTestRunner.class)
+public class WifiSubscriptionDetailPreferenceController2Test {
+
+    @Mock
+    private WifiEntry mMockWifiEntry;
+
+    private WifiSubscriptionDetailPreferenceController2 mPreferenceController;
+    private Context mContext;
+
+    @Before
+    public void setUp() {
+        mContext = RuntimeEnvironment.application;
+
+        mMockWifiEntry = mock(WifiEntry.class);
+        WifiSubscriptionDetailPreferenceController2 preferenceController =
+                new WifiSubscriptionDetailPreferenceController2(mContext);
+        preferenceController.setWifiEntry(mMockWifiEntry);
+        mPreferenceController = spy(preferenceController);
+    }
+
+    @Test
+    public void testUpdateState_canSetPrivacy_shouldBeSelectable() {
+        when(mMockWifiEntry.canManageSubscription()).thenReturn(true);
+
+        assertThat(mPreferenceController.isAvailable()).isTrue();
+    }
+
+    @Test
+    public void testUpdateState_canNotSetPrivacy_shouldNotSelectable() {
+        when(mMockWifiEntry.canManageSubscription()).thenReturn(false);
+
+        assertThat(mPreferenceController.isAvailable()).isFalse();
+    }
+}