This permits each platform to customize the implementations without
the need for ifdefs. Upcoming changes such as the BLuez DBuS addition
will increase the platform differences.
Task-number: QTBUG-68550
Change-Id: I8fc9a74d3ce704466f0bf2c16287e32f222c4376
Reviewed-by: Lubomir I. Ivanov <neolit123@gmail.com>
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>