Fix WindowInsets#getStableInsets

WindowInsets#getStableInsets should return system bar insets as if
system bars are visible, regardless of the window flags.

Fix: 228807465
Test: See if a window with FLAG_LAYOUT_NO_LIMITS or FLAG_FULLSCREEN can
      receive all the system bar insets.
Change-Id: Ib8fff5ba78c8f52141a048027821ef182d2f7992

core/java/android/view/WindowInsets.java

@@ -675,7 +675,7 @@ public final class WindowInsets {
     @Deprecated
     @NonNull
     public Insets getStableInsets() {
-        return getInsets(mTypeMaxInsetsMap, mCompatInsetsTypes);
+        return getInsets(mTypeMaxInsetsMap, systemBars());
     }
 
     /**