ASUS USB-AC56 appears to be based on Realtek RTL8812AU.
https://wikidevi.com/wiki/ASUS_USB-AC56
Android is Linux based and uses Linux drivers which are
kernel-dependent. And as such, there are no drivers you can just
download and install, like in Windows.
You'll have to build the driver yourself from source, against the
Android x86 kernel.
There are various drivers available for your chipset. The Asus driver is
an old version of rtl8821au driver and is officially only compatible
with up to 3.10 kernel.
There are newer drivers for the same chipset:
https://github.com/paralin/rtl8821au
There are others too (Google:
http://lmgtfy.com/?q=rtl8821au+linux+driver).
Can't test any, since I don't have the device in question.