Append accept format and accept version in options.

Append accept format and accept version in options.

If accept format and accept version are not set via option headers,
set them to default value via stack functions.
These values will be passed to rcvdVendorSpecificHeaderOptions through
requestInfo.info.options.

Bug: https://jira.iotivity.org/browse/IOT-1973

Change-Id: I10f589cf3e18fc105640e1a27df5d50aa1b73298
Signed-off-by: Ziran Sun <ziran.sun@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/19535
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Phil Coval <philippe.coval@osg.samsung.com>
Reviewed-by: Uze Choi <uzchoi@samsung.com>
Reviewed-by: Ashok Babu Channa <ashok.channa@samsung.com>