e_policy_wl: send tizen_position changed event while creating tizen_position resource

e_policy_wl: send tizen_position changed event while creating tizen_position resource

If the ec's position is not same to client's geometry which set by client,
then e send tizen_position changed event to the client to notice new position.

There was a bug that the window's position was not changed in below case.
"Hide -> Unset user geometry -> Show -> Set user geometry -> Move -> Resize".
This was because the ec's position was not same to the client's position.
In this case, ec's position was (0,0) and client's position was not (0, 0).

Change-Id: I53074b2de3bb98cb0aeff629a89776bcf1d380cb