Merge "Fix window affecting SysUi visibility for once and all" into oc-dev

am: 6cfc8afa7a

Change-Id: I0bf707ab3ad162b1c7b868719d3347f489f51964

core/java/android/view/WindowManagerPolicy.java

@@ -400,6 +400,13 @@ public interface WindowManagerPolicy {
          */
         boolean isAnimatingLw();
 
+        /**
+         * @return Whether the window can affect SystemUI flags, meaning that SystemUI (system bars,
+         *         for example) will be  affected by the flags specified in this window. This is the
+         *         case when the surface is on screen but not exiting.
+         */
+        boolean canAffectSystemUiFlags();
+
         /**
          * Is this window considered to be gone for purposes of layout?
          */