PXP: Modify APIs and Signal handle implementation

PXP: Modify APIs and Signal handle implementation

1. Add Seperate APIs for Monitor and reporter role.
2. Add implementation to moinotr the PID for reporter service.
3. Remove the property changed handler for monitor role.

Change-Id: I033bc604d7fc2971eecaa65647cec50af7f29840
Signed-off-by: h.sandeep <h.sandeep@samsung.com>