[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/AddDevicePreferenceController2.java

@@ -0,0 +1,86 @@
+/*
+ * 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.content.Intent;
+import android.net.wifi.WifiManager;
+import android.util.Log;
+
+import androidx.preference.Preference;
+
+import com.android.settings.core.BasePreferenceController;
+import com.android.settings.wifi.dpp.WifiDppUtils;
+import com.android.settingslib.wifi.AccessPoint;
+
+/**
+ * {@link BasePreferenceController} that launches Wi-Fi Easy Connect configurator flow
+ */
+public class AddDevicePreferenceController2 extends BasePreferenceController {
+
+    private static final String TAG = "AddDevicePreferenceController2";
+
+    private static final String KEY_ADD_DEVICE = "add_device_to_network";
+
+    private AccessPoint mAccessPoint;
+    private WifiManager mWifiManager;
+
+    public AddDevicePreferenceController2(Context context) {
+        super(context, KEY_ADD_DEVICE);
+
+        mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
+    }
+
+    /**
+     * Initiate with an {@link AccessPoint}.
+     */
+    public AddDevicePreferenceController2 init(AccessPoint accessPoint) {
+        mAccessPoint = accessPoint;
+
+        return this;
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        if (WifiDppUtils.isSupportConfiguratorQrCodeScanner(mContext, mAccessPoint)) {
+            return AVAILABLE;
+        } else {
+            return CONDITIONALLY_UNAVAILABLE;
+        }
+    }
+
+    @Override
+    public boolean handlePreferenceTreeClick(Preference preference) {
+        if (KEY_ADD_DEVICE.equals(preference.getKey())) {
+            WifiDppUtils.showLockScreen(mContext, () -> launchWifiDppConfiguratorQrCodeScanner());
+            return true; /* click is handled */
+        }
+
+        return false; /* click is not handled */
+    }
+
+    private void launchWifiDppConfiguratorQrCodeScanner() {
+        final Intent intent = WifiDppUtils.getConfiguratorQrCodeScannerIntentOrNull(mContext,
+                mWifiManager, mAccessPoint);
+
+        if (intent == null) {
+            Log.e(TAG, "Launch Wi-Fi QR code scanner with a wrong Wi-Fi network!");
+        } else {
+            mContext.startActivity(intent);
+        }
+    }
+}