Implement new keyboard settings UI.

Add enabled input method locales page
Add keyboard layout picker page
Add keyboard settings entry in BT device detail

Bug: 242680718
Test: local test
Change-Id: I07e068ecde553d394697b25cb573f806229f6f52

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

@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2022 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.app.settings.SettingsEnums;
+import android.content.Context;
+import android.os.Bundle;
+
+import com.android.settings.R;
+import com.android.settings.SettingsPreferenceFragment;
+import com.android.settings.search.BaseSearchIndexProvider;
+
+public class NewKeyboardLayoutPickerTitle extends SettingsPreferenceFragment {
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        addPreferencesFromResource(R.xml.new_keyboard_layout_picker_title);
+    }
+
+    @Override
+    public int getMetricsCategory() {
+        // TODO: add new SettingsEnums SETTINGS_KEYBOARDS_LAYOUT_PICKER_TITLE
+        return SettingsEnums.SETTINGS_KEYBOARDS_LAYOUT_PICKER;
+    }
+
+    public static final BaseSearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
+            new BaseSearchIndexProvider(R.xml.new_keyboard_layout_picker_title) {
+                @Override
+                protected boolean isPageSearchEnabled(Context context) {
+                    return false;
+                }
+            };
+}