Use FeatureProvider to provide the firmware update category.

1. Add KeyboardSettingsFeatureProvider in FeatureFactory.
2. Use KeyboardSettingsFeatureProvider to add firmware update UI.

Bug: 270114180
Test: manual, atest KeyboardSettingsFeatureProviderImplTest
Change-Id: I62ec7aff71dd5c0d496860363f2c5b3e992503ff

src/com/android/settings/inputmethod/KeyboardSettingsFeatureProvider.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2023 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.inputmethod;
+
+import android.content.Context;
+
+import androidx.preference.PreferenceScreen;
+
+/**
+ * Provider for Keyboard settings related features.
+ */
+public interface KeyboardSettingsFeatureProvider {
+
+    /**
+     * Checks whether the connected device supports firmware update.
+     *
+     * @return true if the connected device supports firmware update.
+     */
+    boolean supportsFirmwareUpdate();
+
+    /**
+     * Add firmware update preference category .
+     *
+     * @param context The context to initialize the application with.
+     * @param screen  The {@link PreferenceScreen} to add the firmware update preference category.
+     *
+     * @return true if the category is added successfully.
+     */
+    boolean addFirmwareUpdateCategory(Context context, PreferenceScreen screen);
+}