Add Copyright

app/src/main/java/com/kunzisoft/keepass/activities/ImageViewerActivity.kt

@@ -1,3 +1,22 @@
+/*
+ * Copyright 2021 Jeremy Jamet / Kunzisoft.
+ *
+ * This file is part of KeePassDX.
+ *
+ * KeePassDX is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * KeePassDX 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with KeePassDX.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
 package com.kunzisoft.keepass.activities
 
 import android.os.Bundle