Steps to reproduce the issue:
1. Run attached test application
2. Rotate the device and observe how the orientation sensor values are changing
2. Wait 5 seconds
-> Both sensor instances stop reporting values
Only the sensor that has been stopped stops and doesn't affect on the other instances.
|For Gerrit Dashboard: QTBUG-54977|
|169068,2||iOS: protect OS sensors from being stopped when shared by several Qt sensors||5.6||qt/qtsensors||Status: MERGED||+2||0|