Add frag/defrag logic in EDR

Add frag/defrag logic in EDR

As data is clubbed into single packet when we use EDR adapter in android,
it is necessary to use the fragmentation, defragmentation logic.
As its platforms limitation, to have interoperability
it needs to be handled at EDR adapter.

https://jira.iotivity.org/browse/IOT-692
This code to fix the above Jira issue.

Change-Id: I84d9592775a6a638917e5574a2d8425027f5a26f
Signed-off-by: Jaehong Jo <jaehong.jo@samsung.com>
Signed-off-by: vimala.v <vimala.v@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/2375
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Naga Ashok Jampani <jn.ashok@samsung.com>
Reviewed-by: Patrick Lankswert <patrick.lankswert@intel.com>