Add highlight menu keys for all toggle pref controllers and custom slices

Bug: 204695404
Test: manual, robotest build pass, unit
Change-Id: Iad2e28ada8ddb766ffa7eff2c8dc581250cbd6f8

src/com/android/settings/privacy/EnableContentCapturePreferenceController.java

@@ -18,8 +18,8 @@ package com.android.settings.privacy;
 
 import android.annotation.NonNull;
 import android.content.Context;
-import android.provider.Settings;
 
+import com.android.settings.R;
 import com.android.settings.core.TogglePreferenceController;
 import com.android.settings.utils.ContentCaptureUtils;
 
@@ -46,4 +46,9 @@ public final class EnableContentCapturePreferenceController extends TogglePrefer
                 && ContentCaptureUtils.getServiceSettingsComponentName() == null;
         return available ? AVAILABLE : UNSUPPORTED_ON_DEVICE;
     }
+
+    @Override
+    public int getSliceHighlightMenuRes() {
+        return R.string.menu_key_privacy;
+    }
 }