Switch Gallery2 to use the support lib for printing.

Now we have a class in the support library that uses a correct internal
implemetation based on the API level. On older devices the app does
not crash and on new devices it can print. Also this class does
the heavy lifiting. Gallery2 was not using this class, rather it had
its own (obsolete) implemetation that was not taking into account the
image aspect ratio to provide a hint to the print system for the
orientation to be used.

bug:11099831
Change-Id: I4cd260614af4d9d87ec31d205ee2a5ef02ef5417