Changed OcException message in JniOcPlatform

Changed OcException message in JniOcPlatform

If the function is not supported, we return Not supported message
not fail.

Change-Id: I43b96d6a7c1948a629dfc07a0b557e67987c8733
Signed-off-by: hyuna0213.jo <hyuna0213.jo@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/11175
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: Dave Thaler <dthaler@microsoft.com>
Reviewed-by: Jon A. Cruz <jon@joncruz.org>