Bluetooth: SDP: Notify result if error rsp is received.

In current implementation, the SDP response packet will be ignored if
the operation code is `BT_SDP_ERROR_RSP`. And the SDP transaction
request is done, but the application is not notified. And the pending
SDP transaction cannot be processed.

Notify application with empty buffer if the operation code is
`BT_SDP_ERROR_RSP`. And process the pending SDP transaction.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>