Integrate UI with APIs for trackpad settgins.

1. Integrate with trackpad settings dummy APIs.
2. Integrate with trackpad gesture APIs.

Bug: 247080509
Test: manual, make RunSettingsRoboTests ROBOTEST_FILTER="com.android.settings.inputmethod.*"
Change-Id: Ic180e28896bb0a5aa71eb0eb63d3824bd342ff45

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

@@ -0,0 +1,55 @@
+/*
+ * 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 android.hardware.input.InputManager;
+
+import com.android.settings.R;
+import com.android.settings.core.TogglePreferenceController;
+
+public class TrackpadTapToClickPreferenceController extends TogglePreferenceController {
+
+    private InputManager mIm;
+
+    public TrackpadTapToClickPreferenceController(Context context, String key) {
+        super(context, key);
+
+        mIm = context.getSystemService(InputManager.class);
+    }
+
+    @Override
+    public boolean isChecked() {
+        return mIm.useTouchpadTapToClick(mContext);
+    }
+
+    @Override
+    public boolean setChecked(boolean isChecked) {
+        mIm.setTouchpadTapToClick(mContext, isChecked);
+        return true;
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return AVAILABLE;
+    }
+
+    @Override
+    public int getSliceHighlightMenuRes() {
+        return R.string.menu_key_system;
+    }
+}