C++ mediator changes to keep common code in Provision.cpp file

C++ mediator changes to keep common code in Provision.cpp file

- Fixed stop enrollee process issue at C++ layer
- Updated Build_Instructions_Android_Arduino.txt with .SO path <iotivity>/service/easy-setup/sdk/mediator/android/libs/armeabi
- Fixed issue for waiting logic, it has to be moved to the EnrolleeDeviceWiFiOnboarding.java from EasySetupService.java as this may not require for all EnrolleeDevice. BLE does not require it.
- Fixed merge conflicts & review comment
- Code formmating

Change-Id: I80b6f79aa1f9b46e3ed33e68d80a685453df2b9d
Signed-off-by: Hemant Mahsky <h.mahsky@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/2995
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Madan Lanka <lanka.madan@samsung.com>