In push mode, the state must be IdleState after resume(), and only
change to ActiveState once it receives some data.
Change-Id: I8caff011f517e91629abf45af51580f24136bcea
Task-number: QTBUG-50390
Reviewed-by: Pasi Petäjäjärvi <pasi.petajajarvi@theqtcompany.com>