Extends SeekBarPreference to add labels and callbacks

Adds title, left and right labels to the SeekBarPreference. Also adds
a listener for the seek stop event.

Bug: 146004827
Test: make RunSettingsRoboTests ROBOTEST_FILTER=GestureNavigationSeekBarPreferenceTest

Change-Id: I0ecca4e92cfc52abb8bb975b710f72f75ed5b50d

src/com/android/settings/gestures/GestureNavigationSeekBarPreference.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2019 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.gestures;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.widget.SeekBar;
+
+import androidx.core.content.res.TypedArrayUtils;
+
+import com.android.settings.R;
+import com.android.settings.widget.SeekBarPreference;
+
+/** A slider preference that is used to set the back gesture's sensitivity **/
+public class GestureNavigationSeekBarPreference extends SeekBarPreference {
+
+    private OnPreferenceChangeListener mStopListener;
+
+    public GestureNavigationSeekBarPreference(Context context, AttributeSet attrs, int defStyleAttr,
+            int defStyleRes) {
+
+        super(context, attrs, defStyleAttr, defStyleRes);
+        setLayoutResource(R.layout.preference_gesture_navigation_slider);
+    }
+
+    public GestureNavigationSeekBarPreference(Context context, AttributeSet attrs) {
+        this(context, attrs, TypedArrayUtils.getAttr(context,
+                androidx.preference.R.attr.seekBarPreferenceStyle,
+                com.android.internal.R.attr.seekBarPreferenceStyle), 0);
+    }
+
+    public void setOnPreferenceChangeStopListener(OnPreferenceChangeListener listener) {
+        mStopListener = listener;
+    }
+
+    @Override
+    public void onStopTrackingTouch(SeekBar seekBar) {
+        super.onStopTrackingTouch(seekBar);
+
+        if (mStopListener != null) {
+            mStopListener.onPreferenceChange(this, seekBar.getProgress());
+        }
+    }
+}
+