video: Keep video client from being resized by wl_surface::commit

video: Keep video client from being resized by wl_surface::commit

When video client is displayed on HW overlay, it is wasteful to resize
its evas object. It eventually causes evas rendering to run wastefully.

Plus, evas rendering normally run on idle enterer and
wl_display_flush_clients() which flush its messages for client is
handled on fd handler of ecore event loop.

So, if evas rendering happens because of resize of evas object, then
wl_surface::frame will be delayed depending on it,
even though video contents is not actually rendered by evas.

Change-Id: I44332acf5079a204f8e833f35fe2ef27255bb9dc