Add preference toggle for touchpad acceleration setting

Bug: 387184135
Test: verified on DUT
Flag: com.android.hardware.input.pointer_acceleration
Change-Id: Ic49af4676eaeca6135296fa825d28c8a52af7dc2

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

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2025 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.InputSettings;
+
+import androidx.annotation.NonNull;
+
+import com.android.settings.R;
+import com.android.settings.core.TogglePreferenceController;
+
+public class TouchpadAccelerationPreferenceController extends TogglePreferenceController {
+
+    public TouchpadAccelerationPreferenceController(@NonNull Context context, @NonNull String key) {
+        super(context, key);
+    }
+
+    @Override
+    public boolean isChecked() {
+        return InputSettings.isTouchpadAccelerationEnabled(mContext);
+    }
+
+    @Override
+    public boolean setChecked(boolean isChecked) {
+        InputSettings.setTouchpadAccelerationEnabled(mContext, isChecked);
+        return true;
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        if (!InputSettings.isPointerAccelerationFeatureFlagEnabled()) {
+            return UNSUPPORTED_ON_DEVICE;
+        }
+        return InputPeripheralsSettingsUtils.isTouchpad() ? AVAILABLE : CONDITIONALLY_UNAVAILABLE;
+    }
+
+    @Override
+    public int getSliceHighlightMenuRes() {
+        return R.string.menu_key_system;
+    }
+}