Adjust scroll position immediately after hiding IME

[Title] Adjust scroll position immediately after hiding IME
[Issue#] SE-38425
[Problem] Scroll position is updated too late after hiding IME
[Cause] If there's delay between resize view and didChangeViewportProperties(),
        scroll position is updated too late.
[Solution] Update drawing scroll position on UIProcess right after hiding IME

Change-Id: Ia3d56bf5340ea1e791cd860835f5f3740e6b0d23