Bug fixes in the print dialog

1. Read/write async tasks of the persistence manger used by
   the FusedPrintersProvider could be run more that once, so
   create a new one every time.

2. The fake printer used to save to PDF should not be added
   to printer history.

3. Removed print preview leftover code from the print dialog.

4. Save to PDF was not working on the second consecutive attempt.

5. The fisrt time the orientation change was ignored - regression

Change-Id: I8960ef2cf92dfeeec22fa8751ba8475092b5b65c