[Wi-Fi] Implement Wi-Fi Auto-connect feature

This feature allows users to specify if a Wi-Fi network
will be auto connected after disconnection.

Bug: 136472407
Test: make RunSettingsRoboTests ROBOTEST_FILTER=WifiAutoConnectPreferenceController2Test
Change-Id: I8a7c02ba3fc4cbfbfb431fa99c42279ca29e9492

src/com/android/settings/wifi/details2/WifiAutoConnectPreferenceController2.java

@@ -0,0 +1,57 @@
+/*
+ * 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 android.content.Context;
+
+import com.android.settings.core.TogglePreferenceController;
+import com.android.wifitrackerlib.WifiEntry;
+
+/**
+ * {@link TogglePreferenceController} that controls whether the Wi-Fi Auto-connect feature should be
+ * enabled.
+ */
+public class WifiAutoConnectPreferenceController2 extends TogglePreferenceController {
+
+    private static final String KEY_AUTO_CONNECT = "auto_connect";
+
+    private WifiEntry mWifiEntry;
+
+    public WifiAutoConnectPreferenceController2(Context context) {
+        super(context, KEY_AUTO_CONNECT);
+    }
+
+    public void setWifiEntry(WifiEntry wifiEntry) {
+        mWifiEntry = wifiEntry;
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return mWifiEntry.canSetAutoJoinEnabled() ? AVAILABLE : CONDITIONALLY_UNAVAILABLE;
+    }
+
+    @Override
+    public boolean isChecked() {
+        return mWifiEntry.isAutoJoinEnabled();
+    }
+
+    @Override
+    public boolean setChecked(boolean isChecked) {
+        mWifiEntry.setAutoJoinEnabled(isChecked);
+        return true;
+    }
+}

src/com/android/settings/wifi/details2/WifiNetworkDetailsFragment2.java

@@ -91,7 +91,7 @@ public class WifiNetworkDetailsFragment2 extends DashboardFragment implements
 
     @Override
     protected int getPreferenceScreenResId() {
-        return R.xml.wifi_network_details_fragment;
+        return R.xml.wifi_network_details_fragment2;
     }
 
     @Override
@@ -155,6 +155,11 @@ public class WifiNetworkDetailsFragment2 extends DashboardFragment implements
                 mMetricsFeatureProvider);
         controllers.add(mWifiDetailPreferenceController2);
 
+        final WifiAutoConnectPreferenceController2 wifiAutoConnectPreferenceController2 =
+                new WifiAutoConnectPreferenceController2(context);
+        wifiAutoConnectPreferenceController2.setWifiEntry(wifiEntry);
+        controllers.add(wifiAutoConnectPreferenceController2);
+
         final AddDevicePreferenceController2 addDevicePreferenceController2 =
                 new AddDevicePreferenceController2(context);
         addDevicePreferenceController2.setWifiEntry(wifiEntry);