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/TrackpadPointerSpeedPreferenceController.java

@@ -0,0 +1,76 @@
+/*
+ * 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 androidx.preference.PreferenceScreen;
+
+import com.android.settings.core.SliderPreferenceController;
+import com.android.settings.widget.SeekBarPreference;
+
+public class TrackpadPointerSpeedPreferenceController extends SliderPreferenceController {
+
+    private InputManager mIm;
+    private SeekBarPreference mPreference;
+
+    public TrackpadPointerSpeedPreferenceController(Context context, String key) {
+        super(context, key);
+
+        mIm = context.getSystemService(InputManager.class);
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mPreference = screen.findPreference(getPreferenceKey());
+        mPreference.setMax(getMax());
+        mPreference.setMin(getMin());
+        mPreference.setProgress(getSliderPosition());
+        updateState(mPreference);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return AVAILABLE;
+    }
+
+    @Override
+    public boolean setSliderPosition(int position) {
+        if (position < getMin() || position > getMax()) {
+            return false;
+        }
+        mIm.setTouchpadPointerSpeed(mContext, position);
+        return true;
+    }
+
+    @Override
+    public int getSliderPosition() {
+        return mIm.getTouchpadPointerSpeed(mContext);
+    }
+
+    @Override
+    public int getMin() {
+        return InputManager.MIN_POINTER_SPEED;
+    }
+
+    @Override
+    public int getMax() {
+        return InputManager.MAX_POINTER_SPEED;
+    }
+}