Add Window::SetPositionSize() and remove redundant value check

Add Window::SetPositionSize() and remove redundant value check

For Window::SetPosition() and Window::SetSize(),
calling one after another does not guarantee to be displayed on the screen at once.
The new API SetPositionSize() can guarantee atomic "move + resize".

And this commit also removes duplicate and wrong surface rect check in
Window::SetPosition() and Window::SetSize().
Previously, WindowRenderSurface only allowed at least 2 pixel bigger/smaller size update,
but codes in Window did not fit this condition so that it could cause a bug.

Change-Id: I7479e5124906af8baafc5e2ec8d1a07d8845f007
Signed-off-by: Jiyun Yang <ji.yang@samsung.com>