Use correct transport type for GATT client and server connections

Use correct transport type for GATT client and server connect
API calls. This change uses the transport used while calling
the connect frameworks API instead of relying on the NVRAM to
find the transport on which the connect call needs to be sent
to the BT stack.

Change-Id: Idf5817b8980e848c6ebebf1e9a79dbce61d8cfc8