Enable QSensors support of the Raspberry Pi Sense HAT add on board

QSensors may be used to access cell phone sensors. In response to requests like this https://bugreports.qt.io/browse/QTBUG-53635 additional sensor support is being enabled for mobile platforms such as Android. However it seems the Raspberry Pi Sense HAT sensors cannot be accessed using the QSensor classes, instead the following qt-labs module needs to be used https://github.com/qt-labs/qtsensehat.

Maybe it is possible to expand the existing QSensors classes such as QPressureSensor, QHumiditySensor etc. to be able to access the sensors on the Raspberry Pi's Sense HAT board instead of using an external module. This would facilitate the development of embedded and mobile software with cross-hardware sensor support.