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/location/LocationSlice.java

@@ -88,11 +88,16 @@ public class LocationSlice implements CustomSliceable {
         final Uri contentUri = new Uri.Builder().appendPath(KEY_LOCATION).build();
         return SliceBuilderUtils.buildSearchResultPageIntent(mContext,
                 LocationSettings.class.getName(), KEY_LOCATION, screenTitle,
-                SettingsEnums.LOCATION)
+                SettingsEnums.LOCATION, this)
                 .setClassName(mContext.getPackageName(), SubSettings.class.getName())
                 .setData(contentUri);
     }
 
+    @Override
+    public int getSliceHighlightMenuRes() {
+        return R.string.menu_key_location;
+    }
+
     private PendingIntent getPrimaryAction() {
         final Intent intent = getIntent();
         return PendingIntent.getActivity(mContext, 0 /* requestCode */,