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

tests/unit/src/com/android/settings/inputmethod/KeyboardSettingsFeatureProviderImplTest.java

@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2021 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 static com.google.common.truth.Truth.assertThat;
+
+import android.content.Context;
+import android.os.Looper;
+
+import androidx.preference.PreferenceManager;
+import androidx.preference.PreferenceScreen;
+import androidx.test.core.app.ApplicationProvider;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+public class KeyboardSettingsFeatureProviderImplTest {
+
+    private Context mContext;
+    private KeyboardSettingsFeatureProviderImpl mFeatureProvider;
+
+    @Before
+    public void setUp() {
+        mContext = ApplicationProvider.getApplicationContext();
+        mFeatureProvider = new KeyboardSettingsFeatureProviderImpl();
+    }
+
+    @Test
+    public void supportsFirmwareUpdate_defaultValue_returnsFalse() {
+        assertThat(mFeatureProvider.supportsFirmwareUpdate()).isFalse();
+    }
+
+    @Test
+    public void addFirmwareUpdateCategory_defaultValue_returnsFalse() {
+        if (Looper.myLooper() == null) {
+            Looper.prepare();
+        }
+        PreferenceManager preferenceManager = new PreferenceManager(mContext);
+        PreferenceScreen screen = preferenceManager.createPreferenceScreen(mContext);
+
+        assertThat(mFeatureProvider.addFirmwareUpdateCategory(mContext, screen)).isFalse();
+    }
+}