Android 7 (Nougat) allows several apps to share the screen at the same time. You can use split-screen mode with Horizon Client on an Android 7 (Nougat) device. Horizon Client does not support picture-in-picture mode.
With split-screen mode, you can run Horizon Client and another app side-by-side, or one-above-the other. A dividing line separates the two apps, and you can make one app larger and the other app smaller.