Move Automatic System Updates from Developer Options to System

- Move the preference to the system xml file.
- DisableAutomaticUpdatesPreferenceController should not
inherit from the developer preference controller now since it's not used
in developer page anymore. Instead, just use toggle preference
controller for changing the state.
- Rewrite the test cases based on new controller.

Test: The ui works well and search can navigate to correct path.
Fix: 196001125
Change-Id: Iaea3e11d9cdbfa073ebd41bc3c84356d564c7e71

src/com/android/settings/system/DisableAutomaticUpdatesPreferenceController.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2017 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.system;
+
+import android.content.Context;
+import android.provider.Settings;
+
+import androidx.annotation.VisibleForTesting;
+
+import com.android.settings.core.TogglePreferenceController;
+
+/** A controller maintains the state of Automatic System Update feature. */
+public class DisableAutomaticUpdatesPreferenceController extends TogglePreferenceController {
+
+    // We use the "disabled status" in code, but show the opposite text
+    // "Automatic system updates" on screen. So a value 0 indicates the
+    // automatic update is enabled.
+    @VisibleForTesting
+    static final int DISABLE_UPDATES_SETTING = 1;
+    @VisibleForTesting
+    static final int ENABLE_UPDATES_SETTING = 0;
+
+    public DisableAutomaticUpdatesPreferenceController(Context context, String key) {
+        super(context, key);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return AVAILABLE;
+    }
+
+    @Override
+    public boolean isChecked() {
+        return Settings.Global.getInt(mContext.getContentResolver(),
+                Settings.Global.OTA_DISABLE_AUTOMATIC_UPDATE, ENABLE_UPDATES_SETTING /* default */)
+                == ENABLE_UPDATES_SETTING;
+    }
+
+    @Override
+    public boolean setChecked(boolean isChecked) {
+        return Settings.Global.putInt(mContext.getContentResolver(),
+                Settings.Global.OTA_DISABLE_AUTOMATIC_UPDATE,
+                isChecked ? ENABLE_UPDATES_SETTING : DISABLE_UPDATES_SETTING);
+    }
+}