Change visibility check to WC.isVisible

...in order to closer match our mental model of what we consider
a window to be visible.

Bug: 118118435
Test: adb shell dumpsys window visible while status bar hidden
Change-Id: I4247eb2d52ddbd07c38824300965d7499b99848f

services/core/java/com/android/server/wm/WindowManagerService.java

@@ -6126,7 +6126,7 @@ public class WindowManagerService extends IWindowManager.Stub
                 }
 
                 mRoot.forAllWindows((w) -> {
-                    if ((!visibleOnly || w.mWinAnimator.getShown())
+                    if ((!visibleOnly || w.isVisible())
                             && (!appsOnly || w.mActivityRecord != null)) {
                         windows.add(w);
                     }