cmsdk: Fix Profile parceling for custom objects.

  Since these objects aren't part of the bootclasspath
  we need to explicitely write them as typed arrays so
  we can unmarshall them on the other side of the IPC
  call correctly. Also change the addProfileGroup method
  to filter out possible null groups.

Change-Id: I501f46895440a174201c4bc413f4d3e6ee16a5ce