[easy-setup] Updated Arduino Enrollee sample app for taking user input

[easy-setup] Updated Arduino Enrollee sample app for taking user input

- Modified Arduino sample and the corresponding code to accept input from sample user
- Added a new enum to provide the status of the enrollee along with the result
- Modified the callback handler to accept enrollee status

Change-Id: Ie0e8720c17315c0e022155727cc472f854308ead
Signed-off-by: lankamadan <lanka.madan@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/3623
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>