Remove the xml entry when the system language is removed

Bug: 301395074
Test: atest SettingsRoboTests:com.android.settings.localepicker
Change-Id: Ic771cd5146ab954c3da65748bf87cd14d30770b4

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

@@ -62,6 +62,17 @@ public class LocaleNotificationDataManager {
         editor.apply();
     }
 
+    /**
+     * Removes one entry with the corresponding locale from the {@link SharedPreferences}.
+     *
+     * @param locale A locale which the application sets to
+     */
+    public void removeNotificationInfo(String locale) {
+        SharedPreferences.Editor editor = getSharedPreferences(mContext).edit();
+        editor.remove(locale);
+        editor.apply();
+    }
+
     /**
      * Gets the {@link NotificationInfo} with the associated locale from the
      * {@link SharedPreferences}.