Clean up for OPP

- Remove Operation enum, because we only support put requests
- Add the request to the transfer reply
- Move startOPP to the private area

Task-number: QTBUG-32726

Change-Id: If7dae547326cb74dcdd6449c08dc0d91fb8a78b2
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>
QNX Bluetooth adding OPP

Makes it possible to send QFiles over OPP. Other QIODevices do not work yet.

Change-Id: I3a85a1f4a95c9059143f20d01c20ac27961e4a09
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>