Added send logic to check write/notify in Tizen 2.4 BLE Client

Added send logic to check write/notify in Tizen 2.4 BLE Client

I have modified transmission logic for BLE.
when there is a big message to sent,
next segmentation data has to wait for
callback write/notify Characteristic for previous sent data.

Change-Id: I8ad967955926d9ebd710dbb0571220d7c39b7668
Signed-off-by: koushik.girijala <g.koushik@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/4891
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Jon A. Cruz <jonc@osg.samsung.com>