Reset LE connecting flag on disconnect only if BDA matches

This change will make sure that the flag representing that BLE device
is connecting is made false only if a disconnection of the same
LE device is received, whose connection is in progress. This is ensured
by matching the bda of the disconnecting device and the LE device which
is in connecting state. This is to prevent a BR/EDR disconnection from
cancelling the connection timeout of an LE device

Change-Id: Ia5b47681479dc0be217cdfc3e15af9ca5323575c