Tutorial improvement for Accessibility shortcut (1/n).

Because can't save the value into setting keys for the service before version R, and in order to let tutorial dialog can get the consistent value, using alternative that each fragment with shortcut to must implement the new abstract method.

Bug: 148989018
Test: manual test
Change-Id: Iba2a7daa70eb00f0bba37317c9355531fbb77628

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

@@ -106,7 +106,7 @@ public class ToggleAccessibilityServicePreferenceFragment extends
     // capabilities. For
     // example, before JellyBean MR2 the user was granting the explore by touch
     // one.
-    private AccessibilityServiceInfo getAccessibilityServiceInfo() {
+    AccessibilityServiceInfo getAccessibilityServiceInfo() {
         final List<AccessibilityServiceInfo> infos = AccessibilityManager.getInstance(
                 getPrefContext()).getInstalledAccessibilityServiceList();
 
@@ -197,6 +197,12 @@ public class ToggleAccessibilityServicePreferenceFragment extends
         }
     }
 
+    @Override
+    int getUserShortcutTypes() {
+        return AccessibilityUtil.getUserShortcutTypesFromSettings(getPrefContext(),
+                mComponentName);
+    }
+
     @Override
     protected void updateToggleServiceTitle(SwitchPreference switchPreference) {
         final AccessibilityServiceInfo info = getAccessibilityServiceInfo();