[Wi-Fi] Create WifiNetworkDetailsFragment related version 2 files for WifiTracker2 development

Create below version 2 files for WifiTracker2 development, we can
check the feature flag only a few times and easily remove version 1
files in the future.

    src/com/android/settings/wifi/details2/
    src/com/android/settings/wifi/savedaccesspoints2/
    tests/robotests/src/com/android/settings/wifi/details2/
    tests/robotests/src/com/android/settings/wifi/savedaccesspoints2/

Bug: 143326832
Test: make RunSettingsRoboTests -j ROBOTEST_FILTER=com.android.settings.wifi.details2
      make RunSettingsRoboTests -j ROBOTEST_FILTER=com.android.settings.wifi.savedaccesspoints2

Change-Id: I4d2caf1ce313871605252395764b02747240f217

src/com/android/settings/wifi/savedaccesspoints2/SavedAccessPointsWifiSettings2.java

@@ -0,0 +1,136 @@
+/*
+ * Copyright (C) 2019 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.savedaccesspoints2;
+
+import android.annotation.Nullable;
+import android.app.settings.SettingsEnums;
+import android.content.Context;
+import android.os.Bundle;
+
+import androidx.annotation.VisibleForTesting;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.R;
+import com.android.settings.core.SubSettingLauncher;
+import com.android.settings.dashboard.DashboardFragment;
+import com.android.settings.wifi.WifiSettings;
+import com.android.settings.wifi.details2.WifiNetworkDetailsFragment2;
+import com.android.settingslib.wifi.AccessPoint;
+import com.android.settingslib.wifi.AccessPointPreference;
+
+/**
+ * UI to manage saved networks/access points.
+ */
+public class SavedAccessPointsWifiSettings2 extends DashboardFragment {
+
+    private static final String TAG = "SavedAccessPoints2";
+
+    @VisibleForTesting
+    Bundle mAccessPointSavedState;
+    private AccessPoint mSelectedAccessPoint;
+
+    // Instance state key
+    private static final String SAVE_DIALOG_ACCESS_POINT_STATE = "wifi_ap_state";
+
+    @Override
+    public int getMetricsCategory() {
+        return SettingsEnums.WIFI_SAVED_ACCESS_POINTS;
+    }
+
+    @Override
+    protected int getPreferenceScreenResId() {
+        return R.xml.wifi_display_saved_access_points2;
+    }
+
+    @Override
+    protected String getLogTag() {
+        return TAG;
+    }
+
+    @Override
+    public void onAttach(Context context) {
+        super.onAttach(context);
+        use(SavedAccessPointsPreferenceController2.class)
+                .setHost(this);
+        use(SubscribedAccessPointsPreferenceController2.class)
+                .setHost(this);
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        if (savedInstanceState != null) {
+            if (savedInstanceState.containsKey(SAVE_DIALOG_ACCESS_POINT_STATE)) {
+                mAccessPointSavedState =
+                        savedInstanceState.getBundle(SAVE_DIALOG_ACCESS_POINT_STATE);
+            } else {
+                mAccessPointSavedState = null;
+            }
+        }
+    }
+
+    @Override
+    public void onStart() {
+        super.onStart();
+        if (mAccessPointSavedState != null) {
+            final PreferenceScreen screen = getPreferenceScreen();
+            use(SavedAccessPointsPreferenceController2.class).displayPreference(screen);
+            use(SubscribedAccessPointsPreferenceController2.class).displayPreference(screen);
+        }
+    }
+
+    /**
+     * Shows {@link WifiNetworkDetailsFragment2} for assigned {@link AccessPointPreference}.
+     */
+    public void showWifiPage(@Nullable AccessPointPreference accessPoint) {
+        removeDialog(WifiSettings.WIFI_DIALOG_ID);
+
+        if (accessPoint != null) {
+            // Save the access point and edit mode
+            mSelectedAccessPoint = accessPoint.getAccessPoint();
+        } else {
+            // No access point is selected. Clear saved state.
+            mSelectedAccessPoint = null;
+            mAccessPointSavedState = null;
+        }
+
+        if (mSelectedAccessPoint == null) {
+            mSelectedAccessPoint = new AccessPoint(getActivity(), mAccessPointSavedState);
+        }
+        final Bundle savedState = new Bundle();
+        mSelectedAccessPoint.saveWifiState(savedState);
+
+        new SubSettingLauncher(getContext())
+                .setTitleText(mSelectedAccessPoint.getTitle())
+                .setDestination(WifiNetworkDetailsFragment2.class.getName())
+                .setArguments(savedState)
+                .setSourceMetricsCategory(getMetricsCategory())
+                .launch();
+    }
+
+    @Override
+    public void onSaveInstanceState(Bundle outState) {
+        super.onSaveInstanceState(outState);
+        // If the dialog is showing (indicated by the existence of mSelectedAccessPoint), then we
+        // save its state.
+        if (mSelectedAccessPoint != null) {
+            mAccessPointSavedState = new Bundle();
+            mSelectedAccessPoint.saveWifiState(mAccessPointSavedState);
+            outState.putBundle(SAVE_DIALOG_ACCESS_POINT_STATE, mAccessPointSavedState);
+        }
+    }
+}