Add new touch and notification vibration intensity settings.

Bug: 64185329
Test: ROBOTEST_FILTER=VibrationSettingsTest m -j RunSettingsRoboTests
Change-Id: I449c7e0041aabfe48935a57cde93e8af77dcd783

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

@@ -0,0 +1,61 @@
+/*
+ * 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.graphics.drawable.Drawable;
+import android.os.Vibrator;
+import android.provider.Settings;
+
+import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
+import com.android.settings.R;
+
+/**
+ * Fragment for picking accessibility shortcut service
+ */
+public class TouchVibrationPreferenceFragment extends VibrationPreferenceFragment {
+    @Override
+    public int getMetricsCategory() {
+        return MetricsEvent.ACCESSIBILITY_VIBRATION_TOUCH;
+    }
+
+    @Override
+    protected int getPreferenceScreenResId() {
+        return R.xml.accessibility_touch_vibration_settings;
+    }
+
+    /**
+     * Get the setting string of the vibration intensity setting this preference is dealing with.
+     */
+    @Override
+    protected String getVibrationIntensitySetting() {
+        return Settings.System.HAPTIC_FEEDBACK_INTENSITY;
+    }
+
+    @Override
+    protected int getDefaultVibrationIntensity() {
+        Vibrator vibrator = getContext().getSystemService(Vibrator.class);
+        return vibrator.getDefaultHapticFeedbackIntensity();
+    }
+
+    @Override
+    public void onVibrationIntensitySelected(int intensity) {
+        // We want to keep HAPTIC_FEEDBACK_ENABLED consistent with this setting since some
+        // applications check it directly before triggering their own haptic feedback.
+        final boolean hapticFeedbackEnabled = !(intensity == Vibrator.VIBRATION_INTENSITY_OFF);
+        Settings.System.putInt(getContext().getContentResolver(),
+                Settings.System.HAPTIC_FEEDBACK_ENABLED, hapticFeedbackEnabled ? 1 : 0);
+    }
+}