[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/details2/WifiPrivacyPreferenceController2.java

@@ -0,0 +1,162 @@
+/*
+ * 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.details2;
+
+import android.content.Context;
+import android.net.wifi.WifiConfiguration;
+import android.net.wifi.WifiInfo;
+import android.net.wifi.WifiManager;
+
+import androidx.annotation.VisibleForTesting;
+import androidx.preference.DropDownPreference;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.R;
+import com.android.settings.core.BasePreferenceController;
+import com.android.settings.wifi.WifiDialog;
+import com.android.settingslib.core.AbstractPreferenceController;
+
+/**
+ * {@link AbstractPreferenceController} that controls whether the wifi network is mac randomized
+ * or not
+ */
+public class WifiPrivacyPreferenceController2 extends BasePreferenceController implements
+        Preference.OnPreferenceChangeListener, WifiDialog.WifiDialogListener {
+
+    private static final String KEY_WIFI_PRIVACY = "privacy";
+    private WifiConfiguration mWifiConfiguration;
+    private WifiManager mWifiManager;
+    private boolean mIsEphemeral = false;
+    private boolean mIsPasspoint = false;
+    private Preference mPreference;
+
+    public WifiPrivacyPreferenceController2(Context context) {
+        super(context, KEY_WIFI_PRIVACY);
+        mWifiConfiguration = null;
+        mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
+    }
+
+    public void setWifiConfiguration(WifiConfiguration wifiConfiguration) {
+        mWifiConfiguration = wifiConfiguration;
+    }
+
+    public void setIsEphemeral(boolean isEphemeral) {
+        mIsEphemeral = isEphemeral;
+    }
+
+    public void setIsPasspoint(boolean isPasspoint) {
+        mIsPasspoint = isPasspoint;
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return mWifiManager.isConnectedMacRandomizationSupported()
+                ? AVAILABLE : CONDITIONALLY_UNAVAILABLE;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mPreference = screen.findPreference(getPreferenceKey());
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        final DropDownPreference dropDownPreference = (DropDownPreference) preference;
+        final int randomizationLevel = getRandomizationValue();
+        dropDownPreference.setValue(Integer.toString(randomizationLevel));
+        updateSummary(dropDownPreference, randomizationLevel);
+
+        // Makes preference not selectable, when this is a ephemeral network.
+        if (mIsEphemeral || mIsPasspoint) {
+            preference.setSelectable(false);
+            dropDownPreference.setSummary(R.string.wifi_privacy_settings_ephemeral_summary);
+        }
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        if (mWifiConfiguration != null) {
+            mWifiConfiguration.macRandomizationSetting = Integer.parseInt((String) newValue);
+            mWifiManager.updateNetwork(mWifiConfiguration);
+
+            // To activate changing, we need to reconnect network. WiFi will auto connect to
+            // current network after disconnect(). Only needed when this is connected network.
+            final WifiInfo wifiInfo = mWifiManager.getConnectionInfo();
+            if (wifiInfo != null && wifiInfo.getNetworkId() == mWifiConfiguration.networkId) {
+                mWifiManager.disconnect();
+            }
+        }
+        updateSummary((DropDownPreference) preference, Integer.parseInt((String) newValue));
+        return true;
+    }
+
+    @VisibleForTesting
+    int getRandomizationValue() {
+        if (mWifiConfiguration != null) {
+            return mWifiConfiguration.macRandomizationSetting;
+        }
+        return WifiConfiguration.RANDOMIZATION_PERSISTENT;
+    }
+
+    private static final int PREF_RANDOMIZATION_PERSISTENT = 0;
+    private static final int PREF_RANDOMIZATION_NONE = 1;
+
+    /**
+     * Returns preference index value.
+     *
+     * @param macRandomized is mac randomized value
+     * @return index value of preference
+     */
+    public static int translateMacRandomizedValueToPrefValue(int macRandomized) {
+        return (macRandomized == WifiConfiguration.RANDOMIZATION_PERSISTENT)
+            ? PREF_RANDOMIZATION_PERSISTENT : PREF_RANDOMIZATION_NONE;
+    }
+
+    /**
+     * Returns mac randomized value.
+     *
+     * @param prefMacRandomized is preference index value
+     * @return mac randomized value
+     */
+    public static int translatePrefValueToMacRandomizedValue(int prefMacRandomized) {
+        return (prefMacRandomized == PREF_RANDOMIZATION_PERSISTENT)
+            ? WifiConfiguration.RANDOMIZATION_PERSISTENT : WifiConfiguration.RANDOMIZATION_NONE;
+    }
+
+    private void updateSummary(DropDownPreference preference, int macRandomized) {
+        // Translates value here to set RANDOMIZATION_PERSISTENT as first item in UI for better UX.
+        final int prefMacRandomized = translateMacRandomizedValueToPrefValue(macRandomized);
+        preference.setSummary(preference.getEntries()[prefMacRandomized]);
+    }
+
+    @Override
+    public void onSubmit(WifiDialog dialog) {
+        if (dialog.getController() != null) {
+            final WifiConfiguration newConfig = dialog.getController().getConfig();
+            if (newConfig == null || mWifiConfiguration == null) {
+                return;
+            }
+
+            if (newConfig.macRandomizationSetting != mWifiConfiguration.macRandomizationSetting) {
+                mWifiConfiguration = newConfig;
+                onPreferenceChange(mPreference, String.valueOf(newConfig.macRandomizationSetting));
+            }
+        }
+    }
+}