Complete missing copyright information

Author: HChenX

app/src/main/java/com/sevtinge/hyperceiler/utils/LanguageHelper.java

@@ -1,3 +1,21 @@
+/*
+ * This file is part of HyperCeiler.
+
+ * HyperCeiler is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+ * Copyright (C) 2023-2024 HyperCeiler Contributions
+ */
 package com.sevtinge.hyperceiler.utils;
 
 import android.content.Context;