write Document To File
static void writeDocumentToFile(Context context, Document document, String suffix)
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Helper for writing a document to file. Has no effect if debugging is disabled.
The filename consists of a timestamp concatenated with the suffix. Ex.: if suffix is "_original" then 1469541253_original.jpeg
Destination directory is ginivisionlib
inside your apps external files directory: /sdcard/Android/data/your.app.id/files/ginivisionlib/