Make WindowState mUnderStatusBar reflect position.

The mUnderStatusBar variable was always true but now it changes
when the StackBox is no longer directly under the Status Bar.

Change-Id: I0c9db5790bfa9b0e4bb35e389d539fd941d56730
diff --git a/services/java/com/android/server/wm/DisplayContent.java b/services/java/com/android/server/wm/DisplayContent.java
index 0647296..4a3699c 100644
--- a/services/java/com/android/server/wm/DisplayContent.java
+++ b/services/java/com/android/server/wm/DisplayContent.java
@@ -340,7 +340,7 @@
     boolean setStackBoxSize(Rect contentRect) {
         boolean change = false;
         for (int stackBoxNdx = mStackBoxes.size() - 1; stackBoxNdx >= 0; --stackBoxNdx) {
-            change |= mStackBoxes.get(stackBoxNdx).setStackBoxSizes(contentRect);
+            change |= mStackBoxes.get(stackBoxNdx).setStackBoxSizes(contentRect, true);
         }
         return change;
     }