Migrate ManagedProfileSettings to DashboardFragment

- Move preference related logic to Controllers.
- Add some test cases for controllers.

Test: manual
Test: make RunSettingsRoboTests -j ROBOTEST_FILTER=com.android.settings.accounts
      make RunSettingsRoboTests -j ROBOTEST_FILTER=com.android.settings.core
      atest SettingsGatewayTest UniquePreferenceTest
Change-Id: If4fcd7bf572672c886d5c91b2d15013817d1aa67

src/com/android/settings/accounts/WorkModePreferenceController.java

@@ -0,0 +1,146 @@
+/*
+ * Copyright (C) 2018 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.accounts;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.os.UserHandle;
+import android.os.UserManager;
+import android.support.annotation.VisibleForTesting;
+import android.support.v7.preference.Preference;
+import android.support.v7.preference.PreferenceScreen;
+import android.support.v7.preference.TwoStatePreference;
+import android.util.Log;
+
+import com.android.settings.R;
+import com.android.settings.core.BasePreferenceController;
+import com.android.settings.slices.SliceData;
+import com.android.settingslib.core.lifecycle.LifecycleObserver;
+import com.android.settingslib.core.lifecycle.events.OnStart;
+import com.android.settingslib.core.lifecycle.events.OnStop;
+
+public class WorkModePreferenceController extends BasePreferenceController implements
+        Preference.OnPreferenceChangeListener, LifecycleObserver, OnStart, OnStop {
+
+    private static final String TAG = "WorkModeController";
+
+    private UserManager mUserManager;
+    private UserHandle mManagedUser;
+
+    private Preference mPreference;
+    private IntentFilter mIntentFilter;
+
+    public WorkModePreferenceController(Context context, String key) {
+        super(context, key);
+        mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE);
+        mIntentFilter = new IntentFilter();
+        mIntentFilter.addAction(Intent.ACTION_MANAGED_PROFILE_AVAILABLE);
+        mIntentFilter.addAction(Intent.ACTION_MANAGED_PROFILE_UNAVAILABLE);
+    }
+
+    public void setManagedUser(UserHandle managedUser) {
+        mManagedUser = managedUser;
+    }
+
+    @Override
+    public void onStart() {
+        mContext.registerReceiver(mReceiver, mIntentFilter);
+    }
+
+    @Override
+    public void onStop() {
+        mContext.unregisterReceiver(mReceiver);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return (mManagedUser != null) ? AVAILABLE : DISABLED_FOR_USER;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mPreference = screen.findPreference(getPreferenceKey());
+    }
+
+    @Override
+    public CharSequence getSummary() {
+        return mContext.getText(isChecked()
+                ? R.string.work_mode_on_summary
+                : R.string.work_mode_off_summary);
+    }
+
+    private boolean isChecked() {
+        boolean isWorkModeOn = false;
+        if (mUserManager != null && mManagedUser != null) {
+            isWorkModeOn = !mUserManager.isQuietModeEnabled(mManagedUser);
+        }
+        return isWorkModeOn;
+    }
+
+    private boolean setChecked(boolean isChecked) {
+        if (mUserManager != null && mManagedUser != null) {
+            final boolean quietModeEnabled = !isChecked;
+            mUserManager.requestQuietModeEnabled(quietModeEnabled, mManagedUser);
+        }
+        return true;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        super.updateState(preference);
+        if (preference instanceof TwoStatePreference) {
+            ((TwoStatePreference) preference).setChecked(isChecked());
+        }
+    }
+
+    @Override
+    public final boolean onPreferenceChange(Preference preference, Object newValue) {
+        return setChecked((boolean) newValue);
+    }
+
+    /**
+     * Receiver that listens to {@link Intent#ACTION_MANAGED_PROFILE_AVAILABLE} and
+     * {@link Intent#ACTION_MANAGED_PROFILE_UNAVAILABLE}, and updates the work mode
+     */
+    @VisibleForTesting
+    final BroadcastReceiver mReceiver = new BroadcastReceiver() {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            if (intent == null) {
+                return;
+            }
+            final String action = intent.getAction();
+            Log.v(TAG, "Received broadcast: " + action);
+
+            if (Intent.ACTION_MANAGED_PROFILE_AVAILABLE.equals(action)
+                    || Intent.ACTION_MANAGED_PROFILE_UNAVAILABLE.equals(action)) {
+                if (intent.getIntExtra(Intent.EXTRA_USER_HANDLE,
+                        UserHandle.USER_NULL) == mManagedUser.getIdentifier()) {
+                    updateState(mPreference);
+                }
+                return;
+            }
+            Log.w(TAG, "Cannot handle received broadcast: " + intent.getAction());
+        }
+    };
+
+    @Override
+    @SliceData.SliceType
+    public int getSliceType() {
+        return SliceData.SliceType.SWITCH;
+    }
+}