Release of BlueZ 5.49

This is mostly a bug fix release, with fixes to features such as AVCTP, OBEX, GATT and Mesh. There are however some notable new features also, such as improved heartbeat management support in meshctl as well as a new experimental ConnectDevice D-Bus method on the Adapter interface, which can be used for quick device object creation for testing purpose or when information about the device has been received over some Out-of-Band channel.