Allow cancelling of Bluetooth Beam transfers.

Add an action to the notification entry that allows
cancelling Beam transfers.

Also, each transfer now has a generic timer that
marks the transfer as failed, in case no updates
happen on the transfer at all for 10 seconds.

Change-Id: I9670e4e782e5c1b846a07f7e490a2f317a45fb70
5 files changed