BTA_JvL2capReceive() function

* Function BTA_JvL2capReceive * Description This function reads data from an L2CAP connection * When the operation is complete, tBTA_JV_L2CAP_CBACK is * called with BTA_JV_L2CAP_RECEIVE_EVT. * If there are more data queued in L2CAP than len, the extra data will be discarded. * Returns BTA_JV_SUCCESS, if the request is being processed. * BTA_JV_FAILURE, otherwise.