Cleaned up JNI wrapper, android light sensor resource example, notification mechanism...

Cleaned up JNI wrapper, android light sensor resource example, notification mechanism, soft sensor support for Android

- Clean up of the JNI wrapper layer: unnecessary files are removed.

- The Android bundle sample contains an example that uses the light sensor as an input for a resource.

- Notification mechanism for android based bundle resources for CoAP observeA

- SoftSensor support for Android

Simplified JNI wrapper and removed unnecessary classes.

Change-Id: I0fa6d06e35851218011f2db0ca263e506a0987f4
Signed-off-by: Markus Jung <markus.jung@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/4353
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Madan Lanka <lanka.madan@samsung.com>