VMS Utils: Fixed createDataMessage method.

Before, it used to process only the payload but now it also
takes in VMS layer info and publisher ID.

Bug: 135051289
Fixes: 135051289
Test: Updated unit tests in VmsUtilsTest. Ran the tests on Hawk.
Change-Id: I6c11f95a815af5d7b9fc9288692285766d2ca98f
3 files changed