SettingsMainSwitchPreference should display the restricted icon

if it is restricted.

- Use the RestrictedPreferenceHelper to check the restricted state.

Fix: 179245126
Test: rebotest and see the UI
Change-Id: I3c0e3bd0f3596d6fa548b6f8f10e4d12e7e50c9a

src/com/android/settings/widget/SettingsMainSwitchBar.java

@@ -16,6 +16,8 @@
 
 package com.android.settings.widget;
 
+import static com.android.settingslib.RestrictedLockUtils.EnforcedAdmin;
+
 import android.app.settings.SettingsEnums;
 import android.content.Context;
 import android.util.AttributeSet;
@@ -47,7 +49,7 @@ public class SettingsMainSwitchBar extends MainSwitchBar {
     }
 
     private ImageView mRestrictedIcon;
-    private RestrictedLockUtils.EnforcedAdmin mEnforcedAdmin;
+    private EnforcedAdmin mEnforcedAdmin;
     private boolean mDisabledByAdmin;
 
     private final MetricsFeatureProvider mMetricsFeatureProvider;
@@ -87,7 +89,7 @@ public class SettingsMainSwitchBar extends MainSwitchBar {
      * If admin is not null, disables the text and switch but keeps the view clickable (unless the
      * switch is disabled for other reasons). Otherwise, calls setEnabled.
      */
-    public void setDisabledByAdmin(RestrictedLockUtils.EnforcedAdmin admin) {
+    public void setDisabledByAdmin(EnforcedAdmin admin) {
         mEnforcedAdmin = admin;
         if (admin != null) {
             super.setEnabled(true);