Consider emulators as TCP/IP devices

Emulators were wrongly considered as USB devices, so they were selected
using -d instead of -e (which was inconsistent with the adb behavior).

Refs #3005 <https://github.com/Genymobile/scrcpy/issues/3005>
Refs #3137 <https://github.com/Genymobile/scrcpy/issues/3137>