Introduce DeveloperOptionsPreferenceController

- New abstract class for all preference controllers in developer
 options
 - Used to handle changes in the master switch
 - DeveloperSettingsDashboardFragment has a reference to all preference
 controllers to call "handleMasterSwitchToggled()"

Bug: 34203528
Test: make RunSettingsRoboTests -j40
Change-Id: I64c18f54e22551f025029336880e92ac3a0d4a8c

src/com/android/settings/development/DeveloperOptionsPreferenceController.java

@@ -0,0 +1,46 @@
+/*
+ * 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.development;
+
+import android.content.Context;
+
+import com.android.settings.core.PreferenceControllerMixin;
+import com.android.settingslib.core.AbstractPreferenceController;
+
+/**
+ * This controller is used handle changes for the master switch in the developer options page.
+ *
+ * All Preference Controllers that are a part of the developer options page should inherit this
+ * class.
+ */
+public abstract class DeveloperOptionsPreferenceController extends
+        AbstractPreferenceController implements PreferenceControllerMixin {
+
+    public DeveloperOptionsPreferenceController(Context context) {
+        super(context);
+    }
+
+    /**
+     * Called when developer options is enabled
+     */
+    public abstract void onDeveloperOptionsEnabled();
+
+    /**
+     *Called when developer options is disabled
+     */
+    public abstract void onDeveloperOptionsDisabled();
+}