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Well theoretically yes - however this would only apply fairly late in the boot process since you need active monitoring of the resistance to that pin to select different modes for it. In development you usually need access right in the boot loader. That means in practice that a device would at first show up with a special USB device id - it defaults to the "development device" (for Android devices this is FASTBOOT) then when the kernel start to load it "unplugs" then replugs with the normal production dev id. After this point "Magic" cables might switch different modes. I think a early-boot magic cable is fairly unlikely for the kindle.
A usbnetwork activating cable is a possibility - I might investigate this with a decade-resistor and microusb-breakout board.
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