Kotlin decryption. Fix showing inline attachments

[DenBond7]

it seems that Ivan's realization of recognizing inline attachments works well. Just need to fix the Android side.

MsgBlock.Type.DECRYPTED_ATT -> {
                if (tempDir != null) {
                  try {
                    val decryptedAtt: DecryptedAttMsgBlock = block as DecryptedAttMsgBlock
                    val fileName =
                      FileAndDirectoryUtils.normalizeFileName(decryptedAtt.attMeta.name)
                    val file = if (fileName.isNullOrEmpty()) {
                      File.createTempFile("tmp", null, tempDir)
                    } else {
                      val file = File(tempDir, fileName)
                      if (file.exists()) {
                        FileAndDirectoryUtils.createFileWithIncreasedIndex(tempDir, fileName)
                      } else {
                        file
                      }
                    }
                    FileUtils.writeByteArrayToFile(
                      file,
                      Base64.decode(decryptedAtt.attMeta.data, Base64.DEFAULT)
                    )
                    decryptedAtt.attMeta.data = null //clear raw info to prevent Binder exception
                    decryptedAtt.fileUri = Uri.fromFile(file)
                    msgBlocks?.add(decryptedAtt)
                  } catch (e: Exception) {
                    e.printStackTrace()
                    ExceptionUtil.handleError(e)
                  }
                } else {
                  ExceptionUtil.handleError(IOException("The temp cache dir == null"))
                }
              }

ref

flowcrypt-android/FlowCrypt/src/main/java/com/flowcrypt/email/api/retrofit/response/node/ParseDecryptedMsgResult.kt

Line 79 in 68d4a88

MsgBlock.Type.DECRYPTED_ATT -> {

[DenBond7]

will be fixed with #1420