Add missing WindowDecorationWrapper impls for default case

Even though #updateHoverAndPressStatus and #checkTouchEvent are
essentially no-op even in DesktopModeWindowDecoration, the ViewModel
still invokes the functions on the wrapper, so the
DefaultWindowDecoration needs an implementation or it will result in an
IllegalStateException.

This changes just adds a no-op branch when default window decor is used
given that the ENABLE_HANDLE_INPUT_FIX flag can be assumed to be always
enabled.

Flag: com.android.window.flags.enable_window_decoration_refactor
Bug: 409648813
Test: touch app handle, no crash
Change-Id: I7286643e1736db27945abc9b92007040dcf4d77f