Don't set the internal service discovery state twice to the same

The first call is not necessary as nothing has changed in the meantime.

Change-Id: I8db51fd725dd210b3d5c7b01d399d24877bf9b2f
Reviewed-by: Aaron McCarthy <mccarthy.aaron@gmail.com>
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>
Fix remaining compiler warnings in QtConnectivity module

Change-Id: Iafadb39642c6b2944e8a873bdee49fb87e3ed5e9
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>
Use QLoggingCategory in Bluetooth QML import plugin.

Add some minor include cleanups as well.

Task-number: QTBUG-32253
Change-Id: I2ccb813a9dd85ca16c1ed8aab962418df8157890
Reviewed-by: Fabian Bumberger <fbumberger@rim.com>