Fix InsetsState#calculateVisibleInsets

Before the new insets system, a window wouldn't receive visible insets
if it:
 - has FLAG_LAYOUT_NO_LIMITS,
 - is not TYPE_WALLPAPER or TYPE_SYSTEM_ERROR, and
 - is not in multi-window mode.

This CL makes the visible insets compatible with the legacy insets
system.

Fix: 223536648
Test: atest InsetsStateTest
Change-Id: Ia73142cfae701d0532a9a397366c50aeef82abb2