Convert VibrationSettings to DashboardFragment.

- DashboardFragment integrates Slices and settings search better than
  SettingsPreferenceFragment, and is more testable.

Test: robotests
Change-Id: I5f73836f94712c03521eac6b3f67964524381078

src/com/android/settings/accessibility/HapticFeedbackIntensityPreferenceController.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2018 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.accessibility;
+
+import android.content.Context;
+import android.provider.Settings;
+import android.support.annotation.VisibleForTesting;
+
+public class HapticFeedbackIntensityPreferenceController
+        extends VibrationIntensityPreferenceController {
+
+    @VisibleForTesting
+    static final String PREF_KEY = "touch_vibration_preference_screen";
+
+    public HapticFeedbackIntensityPreferenceController(Context context) {
+        super(context, PREF_KEY, Settings.System.HAPTIC_FEEDBACK_INTENSITY);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return AVAILABLE;
+    }
+
+    @Override
+    protected int getDefaultIntensity() {
+        return mVibrator.getDefaultHapticFeedbackIntensity();
+    }
+
+}