Using -avd emulator param saves us from using the '@' character
at the start of the name (which I didn't do few times, and was
faced with an unresponsive emulator and not immediately seeing
the problem in a debug vm).
Task-number: QTQAINFRA-5596
Change-Id: I3863dc312fd33dae78eeb3dd02f5fb16ca79d72b
Reviewed-by: Simo Fält <simo.falt@qt.io>