To control the device from the computer:
- retrieve mouse and keyboard SDL events;
- convert them to Android events;
- serialize them;
- send them on the same socket used by the video stream (but in the
opposite direction);
- deserialize the events on the Android side;
- inject them using the InputManager.
Move the DeviceUtil internal static classes to public classes, in a
separate package (".wrappers").
This paves the way to implement InputManager properly.
