As far as I know it's just the Android stuff. I actually have a copy of a config page. It is a Xerox Workcenter 7845 with system software 073.040.197.28500 Updated on Dec 28, 2017. It's not machine specific. "Print from USB" is Disabled in the printer which means it's Android's responsibility.
It's definately not my responsibility to fix it, but it's the operation I do most often at Staples. I have two files, but can;t post them publicly which will preview correctly and print rotated. One was not created at Staples. The documents open corectly in Acrobat and readers I have used. They PREVIEW properly on the Staples 7845.
I'm just hoping that someone involved with the project could do the test you just did.
It's very frustrating for me.