Integrate Select-To-Speak in Vision Settings.

This allows users to launch Select to Speak service in SetupWizard when
setting up their devices.

Bug: 29517229
Test: manual

Change-Id: I3844e2692e1fc9eb3d0736feb4ca4f74d474130b

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

@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2017 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.os.Bundle;
+
+import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
+
+public class ToggleSelectToSpeakPreferenceFragmentForSetupWizard
+        extends ToggleAccessibilityServicePreferenceFragment {
+
+    private boolean mToggleSwitchWasInitiallyChecked;
+
+    @Override
+    protected void onProcessArguments(Bundle arguments) {
+        super.onProcessArguments(arguments);
+        mToggleSwitchWasInitiallyChecked = mToggleSwitch.isChecked();
+    }
+
+    @Override
+    public int getMetricsCategory() {
+        return MetricsEvent.SUW_ACCESSIBILITY_TOGGLE_SCREEN_READER;
+    }
+
+    @Override
+    public void onStop() {
+        // Log the final choice in value if it's different from the previous value.
+        if (mToggleSwitch.isChecked() != mToggleSwitchWasInitiallyChecked) {
+            mMetricsFeatureProvider.action(getContext(),
+                    MetricsEvent.SUW_ACCESSIBILITY_TOGGLE_SELECT_TO_SPEAK,
+                    mToggleSwitch.isChecked());
+        }
+
+        super.onStop();
+    }
+}
+