The "HA Info U2 Plus" should be able to work with a lot of Android smartphones / tablets, because the "HA Info U2" is reportedly working with a Samsung Galaxy Note 3:
Galaxy Note 3 >> USB OTG cable >> HA Info U2 >> AudioLab M-DAC >> headphones
The Android-powered Galaxy Note 3 has a native USB audio feature.
For Android devices which don't have a native USB audio feature, the USB Audio Player PRO (UAPP) app including its own USB audio soft driver could allow the Android device to work with a USB DAC like the "HA info U2 Plus".
There is a free trial version of UAPP available on Google Play store.