Added CreateMessage API in Android APIs

Added CreateMessage API in Android APIs

1) CreateMessage API added for ProviderService
2) Addition of JNI code for the respective API
3)Refactoring of code

Change-Id: I53c44c09580028b4ec0631b47f31c5b8abb47535
Signed-off-by: nikhil.a <nikhil.a7@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/11053
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Abitha Shankar <abitha.s@samsung.com>
Reviewed-by: Madan Lanka <lanka.madan@samsung.com>
(cherry picked from commit dfb5ff844c058fdbbafb530326e1935cae17673e)
Reviewed-on: https://gerrit.iotivity.org/gerrit/11277
Reviewed-by: Uze Choi <uzchoi@samsung.com>