[Panlingual] Screen title is displayed incorrectly

Fix the issue that the screen title name of the app language page is
displayed incorrectly

Bug: 227285277
Test: Verify the issue by testing between the system language and app
language page

Change-Id: I229b9ff2defb68d70248a95886d8600e1bc464ea

core/java/com/android/internal/app/LocalePickerWithRegion.java

@@ -61,6 +61,7 @@ public class LocalePickerWithRegion extends ListFragment implements SearchView.O
     private int mFirstVisiblePosition = 0;
     private int mTopDistance = 0;
     private String mAppPackageName;
+    private CharSequence mTitle = null;
 
     /**
      * Other classes can register to be notified when a locale was selected.
@@ -202,6 +203,7 @@ public class LocalePickerWithRegion extends ListFragment implements SearchView.O
             return;
         }
 
+        mTitle = getActivity().getTitle();
         final boolean countryMode = mParentLocale != null;
         final Locale sortingLocale = countryMode ? mParentLocale.getLocale() : Locale.getDefault();
         mAdapter = new SuggestedLocaleAdapter(mLocaleList, countryMode, mAppPackageName);
@@ -237,7 +239,7 @@ public class LocalePickerWithRegion extends ListFragment implements SearchView.O
         if (mParentLocale != null) {
             getActivity().setTitle(mParentLocale.getFullNameNative());
         } else {
-            getActivity().setTitle(R.string.language_selection_title);
+            getActivity().setTitle(mTitle);
         }
 
         getListView().requestFocus();