[connectivity] Fix parameter type mismatches.

[connectivity] Fix parameter type mismatches.

To match the corresponding callback function prototype
(e.g. CANetworkPacketReceivedCallback and CAErrorHandleCallback), the
data length parameter for a few callback function implementations
should have been of type size_t instead uint32_t.  This addresses
several parameter type mismatch warnings on 64 bit platforms.

Change-Id: Iaa5740a9fdb9d59fa13832eb3b87335d3355bd37
Signed-off-by: Ossama Othman <ossama.othman@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/14237
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Dan Mihai <Daniel.Mihai@microsoft.com>
Reviewed-by: Ziran Sun <ziran.sun@samsung.com>
Reviewed-by: Mike Fenelon <mike.fenelon@microsoft.com>