Add OCConvertStringToUuid on C_common

Add OCConvertStringToUuid on C_common

Patch 1,2: Expose ConvertStrToUUID on OC stack to use common
Ptach 3: Add OCConvertStringToUuid on C_common

Change-Id: Icf9b0ee1bda6fa4d914c696fbbdc27e0998a7262
Signed-off-by: js126.lee <js126.lee@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/14605
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Chul Lee <chuls.lee@samsung.com>
Reviewed-by: Joonghwan Lee <jh05.lee@samsung.com>
Reviewed-by: Randeep Singh <randeep.s@samsung.com>
(cherry picked from commit d026fc6e98db05280cb7e94aacffd1d7d09838d7)
Reviewed-on: https://gerrit.iotivity.org/gerrit/14723