Add RD C++ API to supporting QoS in OCPlatform

Add RD C++ API to supporting QoS in OCPlatform

- add publishResourceToRD() overload function
- add deleteResourceFromRD() overload function
- remove unnecessary code
- add null check logic for input parameter

Change-Id: Ib3ad9d196af4a1b1662a4fca0dce40e963dc78f5
Signed-off-by: hyuna0213.jo <hyuna0213.jo@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/9907
Reviewed-by: Jaehong Jo <jaehong.jo@samsung.com>
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: jihwan seo <jihwan.seo@samsung.com>
Reviewed-by: Jaewook Jung <jw0213.jung@samsung.com>
Reviewed-by: Ziran Sun <ziran.sun@samsung.com>