Accessibility shortcut secondary action - divide different fragment for different fragment type

Different accessibility service fragment type have different UI.
- AccessibilityServiceFragmentType.LEGACY will use LegacyAccessibilityServicePreferenceFragment
- AccessibilityServiceFragmentType.INVISIBLE will use InvisibleToggleAccessibilityServicePreferenceFragment
- AccessibilityServiceFragmentType.INTUITIVE will use ToggleAccessibilityServicePreferenceFragment

Bug: 142530063
Test: Manual
Change-Id: Ib32a4f97514450e5c0d29e99c22935efecf8b6df

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

@@ -0,0 +1,41 @@
+/*
+ * 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.accessibility;
+
+import android.accessibilityservice.AccessibilityServiceInfo;
+import android.os.Bundle;
+
+import com.android.settings.SettingsActivity;
+import com.android.settings.widget.SwitchBar;
+
+/**
+ * For accessibility services that target SDK > Q, and
+ * {@link AccessibilityServiceInfo#FLAG_REQUEST_ACCESSIBILITY_BUTTON}
+ * is set.
+ */
+public class InvisibleToggleAccessibilityServicePreferenceFragment extends
+        ToggleAccessibilityServicePreferenceFragment {
+
+    @Override
+    public void onActivityCreated(Bundle savedInstanceState) {
+        super.onActivityCreated(savedInstanceState);
+
+        final SettingsActivity activity = (SettingsActivity) getActivity();
+        final SwitchBar mSwitchBar = activity.getSwitchBar();
+        mSwitchBar.hide();
+    }
+}