Ecore_Win32: move monitor window initialization to earlier in init func

Ecore_Win32: move monitor window initialization to earlier in init func

Summary: This monitor window is just used to receive events when mutiple
monitors are available. it should not be managed by the ecore loop
(creation and destruction events), so initting it earlier means
ecore_win32 attaches less memory/overhead to it as it's just being
used for notifications for devices.

Test Plan: DrMemory to check used memory

Reviewers: cedric

Subscribers: jpeg

Differential Revision: https://phab.enlightenment.org/D5736