Handle pairing timeout during remote name request

If a remote name request is in progress and a pairing timeout is
triggered, the host needs to post the bond failure to the UI and
needs to reset the pairing cb state, otherwise the UI will be stuck
in pairing mode and scanning won't work until Bluetooth is cycled
OFF->ON.

Change-Id: I76d9a83b1db7236db51617da998b5857b0de39f0