Move date/time prefs to PreferenceController and add tests.

Bug: 32996243
Test: RunSettingsRoboTests
Change-Id: Ie537bbcc35a96a63251e46f84b57c0a861b9d013

src/com/android/settings/datetime/AutoTimeZonePreferenceController.java

@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2016 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.datetime;
+
+import android.content.Context;
+import android.provider.Settings;
+import android.support.v14.preference.SwitchPreference;
+import android.support.v7.preference.Preference;
+
+import com.android.settings.Utils;
+import com.android.settings.core.PreferenceController;
+
+public class AutoTimeZonePreferenceController extends PreferenceController
+        implements Preference.OnPreferenceChangeListener {
+
+    private static final String KEY_AUTO_TIME_ZONE = "auto_zone";
+
+    private final boolean mIsFromSUW;
+    private final UpdateTimeAndDateCallback mCallback;
+
+    public AutoTimeZonePreferenceController(Context context, UpdateTimeAndDateCallback callback,
+            boolean isFromSUW) {
+        super(context);
+        mCallback = callback;
+        mIsFromSUW = isFromSUW;
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return !(Utils.isWifiOnly(mContext) || mIsFromSUW);
+    }
+
+    @Override
+    public boolean handlePreferenceTreeClick(Preference preference) {
+        return false;
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return KEY_AUTO_TIME_ZONE;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        if (!(preference instanceof SwitchPreference)) {
+            return;
+        }
+        ((SwitchPreference) preference).setChecked(isEnabled());
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        boolean autoZoneEnabled = (Boolean) newValue;
+        Settings.Global.putInt(mContext.getContentResolver(), Settings.Global.AUTO_TIME_ZONE,
+                autoZoneEnabled ? 1 : 0);
+        mCallback.updateTimeAndDateDisplay(mContext);
+        return true;
+    }
+
+    public boolean isEnabled() {
+        return Settings.Global.getInt(mContext.getContentResolver(),
+                Settings.Global.AUTO_TIME_ZONE, 0) > 0;
+    }
+}