Android JNI compilation issue fix & added build option for specifying type of Enrollee

Android JNI compilation issue fix & added build option for specifying type of Enrollee

- JNI compilation issue is happening due to a change in file location and a structure name change.
- Seperated Arduino specific implementation using #ifdef
- Changed file persmission for some of the files from 777 to 644

Change-Id: Id73eac55bb678c9e6bddb288db55e5d8cd4680d1
Signed-off-by: lankamadan <lanka.madan@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/4865
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>