Fix things to support EvasPlugin

Fix things to support EvasPlugin

1. Expose several internal API
  * Adaptor::AddWindow
  * Adaptor::SurfaceResizePrepare, SurfaceResizeComplete
  * Adaptor::OnWindowShown, OnWindowHidden
  * KeyLookup::GetDaliKeyCode

2. InputMethodContextWl supports not only WindowRenderSurface but NativeRenderSurface

3. EglImplementation::ReplaceSurfaceWindow() seems to have a bug.
   It calls MakeContextCurrent with destroyed surface.

Change-Id: I901c34d5d4bf40a4ba0075c13cf8ebe6b60e8500
Signed-off-by: Jiyun Yang <ji.yang@samsung.com>