Add link functionality in message of magnification triple-tap dialog

Bug: 210593079
Test: make RunSettingsRoboTests ROBOTEST_FILTER=ShortcutPreferenceTest
Test: make RunSettingsRoboTests ROBOTEST_FILTER=MagnificationModePreferenceControllerTest
Change-Id: Id69b0b717410b5c5c44a818c36688bb7331c73ae

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

@@ -64,6 +64,11 @@ public class ShortcutPreference extends Preference {
         setLayoutResource(R.layout.accessibility_shortcut_secondary_action);
         setWidgetLayoutResource(R.layout.preference_widget_primary_switch);
         setIconSpaceReserved(false);
+        // Treat onSettingsClicked as this preference's click.
+        setOnPreferenceClickListener(preference -> {
+            callOnSettingsClicked();
+            return true;
+        });
     }
 
     @Override