Add DockUpdaterFeatureProvider and DockUpdater.

Add the new feature components for dock devices.

Bug: 77931823
Test: Build
Change-Id: I219a5256d02f2b1b8ea7cce1cff4219975f2eae2

src/com/android/settings/connecteddevice/dock/DockUpdater.java

@@ -0,0 +1,43 @@
+/*
+ * 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.connecteddevice.dock;
+
+import android.content.Context;
+
+/**
+ * Update the dock devices. It notifies the upper level whether to add/remove the preference
+ * through {@link DevicePreferenceCallback}
+ */
+public interface DockUpdater {
+
+    /**
+     * Register the dock event callback and update the list
+     */
+    default void registerCallback() {
+    }
+
+    /**
+     * Unregister the dock event callback
+     */
+    default void unregisterCallback() {
+    }
+
+    /**
+     * Force to update the list of dock devices
+     */
+    default void forceUpdate() {
+    }
+}

src/com/android/settings/connecteddevice/dock/DockUpdaterFeatureProviderImpl.java

@@ -0,0 +1,29 @@
+package com.android.settings.connecteddevice.dock;
+
+import android.content.Context;
+
+import com.android.settings.connecteddevice.DevicePreferenceCallback;
+import com.android.settings.connecteddevice.dock.DockUpdater;
+import com.android.settings.overlay.DockUpdaterFeatureProvider;
+
+/**
+ * Impl for {@link DockUpdaterFeatureProvider}
+ */
+public class DockUpdaterFeatureProviderImpl implements DockUpdaterFeatureProvider {
+
+    @Override
+    public DockUpdater getConnectedDockUpdater(Context context,
+            DevicePreferenceCallback devicePreferenceCallback) {
+        final DockUpdater updater = new DockUpdater() {
+        };
+        return updater;
+    }
+
+    @Override
+    public DockUpdater getSavedDockUpdater(Context context,
+            DevicePreferenceCallback devicePreferenceCallback) {
+        final DockUpdater updater = new DockUpdater() {
+        };
+        return updater;
+    }
+}