Use new Archiver module where applicable (#13782)

- ArchiveViewer: instead of using unzip and to support more formats
  (only CBR & RAR for now)
- NewsDownloader & Wikipedia plugins: instead of using `ZipWriter`
- device: re-implement `Device:unpackArchive` and get rid of device
  specific `untar` implementations
- readerui: instead of using unzip for document provider detection

frontend/device/android/device.lua

@@ -544,10 +544,6 @@ function Device:_showLightDialog()
     end
 end
 
-function Device:untar(archive, extract_to)
-    return android.untar(archive, extract_to)
-end
-
 function Device:download(link, name, ok_text)
     local ConfirmBox = require("ui/widget/confirmbox")
     local InfoMessage = require("ui/widget/infomessage")