The mentioned Android devices are stock devices: the vast majority of people are used to use stock devices.
The USB OTG feature of your Google Nexus 4 has to be enabled by a custom kernel.
Then, such a Nexus 4, operating as USB host and using USB Audio Recorder PRO, can work with USB peripheral like FiiO E17.
However, the following
. Google Nexus 4 powered by a custom kernel using USB Audio Recorder PRO (smartphone):
will be exceptionally included in the next updated compatibility list at page 170 + n*5.
Usually only stock Android device is included in the compatibility list.