Read a file as ByteArray

Utils.kt

@Throws(Exception::class)
fun readFile(filePath: String): ByteArray {
     val file = File(filePath)
     val fileContents = file.readBytes()
     val inputBuffer = BufferedInputStream(
         FileInputStream(file)
     )

     inputBuffer.read(fileContents)
     inputBuffer.close()

     return fileContents
}