Fix FileUriSource::getFilename()

src/main/java/com/kdanmobile/reader/copyfile/FileUriSource.kt

@@ -12,7 +12,7 @@ import java.net.URLEncoder
 class FileUriSource(private val context: Context, private val uri: Uri): CopyFileSource {
 
     override fun getFileName(): String? {
-        return DocumentFile.fromSingleUri(context, uri)?.name ?: Uri.decode(uri.pathSegments?.last())
+        return DocumentFile.fromSingleUri(context, uri)?.name ?: uri.lastPathSegment
     }
 
     override fun getFilePath(): String? {