S60: Introduce a communications device type.

- Introduce a communications device type flag, add stubs for
  Bluetooth to serialdevicelister and pass the device type
  in new struct CommunicationDevice along to run configuration
  and debugger start parameters (overriding the debugger settings).
- Give the s60devices::Device a tooltip in the settings page

src/plugins/debugger/debuggermanager.cpp

@@ -216,6 +216,7 @@ static const char *stateName(int s)
 DebuggerStartParameters::DebuggerStartParameters()
   : attachPID(-1),
     useTerminal(false),
+    remoteChannelType(-1),
     toolChainType(ProjectExplorer::ToolChain::UNKNOWN),
     startMode(NoStartMode)
 {}