Android: Fix error signal handling for rfcomm sockets

The signal/slot connection actually uses an int as parameter

Change-Id: Ib9221137c36020d71834dca53040e174f855318e
Reviewed-by: Nedim Hadzic <nhadzic@blackberry.com>
Reviewed-by: Fabian Bumberger <fbumberger@rim.com>
Doc: Fix doc warning

 examples/bluetooth/picturetransfer/doc/src/picturetransfer.qdoc:28: warning: Can't link to 'FolderListModel'

Change-Id: I384bc4613a7b025c1bc732e9965dc91331d911ae
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Replace double quote with single quote for single characters

Adding single characters to a QString is faster if the characters
are QChars and not QStrings.

Change-Id: I31a9e24b31bad76726231c8d164584abddde6c28
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
Merge remote-tracking branch 'origin/stable' into dev

Change-Id: I93fc84dd750c5d4341518c2a8367d176353decad