proc-watchdog: correct the change in the processing parts for each dbus signal

proc-watchdog: correct the change in the processing parts for each dbus signal

It was an old bug even though there is no big impact.
"freeze" signal has both type and pid,
and "suspend" signal has no param.
But it was reversed from the beginning and
an unnecessary error log was continuously being printed in the journal.

Change-Id: I964c99a04c55ec104148e954782a3069e835f0ae
Signed-off-by: ByungSoo Kim <bs1770.kim@samsung.com>
Change-Id: I244b637e62916fa5560ca27614aa8def3a4c3dca
Signed-off-by: Hyotaek Shim <hyotaek.shim@samsung.com>