tmf: move trace type detection utility to tmf.core

tmf: move trace type detection utility to tmf.core

and have the UI utility call this method. But doing this the trace
type detection can be run independently from the UI.

Change-Id: I6ec3043791647773a7768f4117f1dcdef2211e32
Signed-off-by: Bernd Hufmann <Bernd.Hufmann@ericsson.com>
Reviewed-on: https://git.eclipse.org/r/66530
Reviewed-by: Hudson CI
Reviewed-by: Patrick Tasse <patrick.tasse@gmail.com>
Tested-by: Patrick Tasse <patrick.tasse@gmail.com>