[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: I5dbb10763bd5cc346bff9c270b14b945eb499273

src/com/android/settings/localepicker/LocalePickerWithRegionActivity.java

@@ -36,6 +36,7 @@ public class LocalePickerWithRegionActivity extends SettingsBaseActivity
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         getActionBar().setDisplayHomeAsUpEnabled(true);
+        setTitle(R.string.add_a_language);
 
         final LocalePickerWithRegion selector = LocalePickerWithRegion.createLanguagePicker(
                 this, LocalePickerWithRegionActivity.this, false /* translate only */);