[IOT-931] Added send logic to check write/notify in BLE

[IOT-931] Added send logic to check write/notify in BLE

according to android BLE guide,
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: Idf543504d634ab4dfbc2fbd4bb90aa7e2ad1831e
Signed-off-by: jihwan.seo <jihwan.seo@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/4841
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Jaehong Jo <jaehong.jo@samsung.com>
Reviewed-by: Hyuna Jo <hyuna0213.jo@samsung.com>
Reviewed-by: Jon A. Cruz <jonc@osg.samsung.com>