Perform all layouts within first loop.

Do not begin animation while layout requests are still
outstanding.

Bug: 7333622 fixed.
Change-Id: I77c2cdc123c1e26f9661feade0d9a1843c75d5f6

Author: Craig Mautner

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

@@ -8117,8 +8117,16 @@ private final void assignLayersLocked(WindowList windows) {
         }
     }
 
-    private boolean mInLayout = false;
     private final void performLayoutAndPlaceSurfacesLocked() {
+        do {
+            mTraversalScheduled = false;
+            performLayoutAndPlaceSurfacesLockedLoop();
+            mH.removeMessages(H.DO_TRAVERSAL);
+        } while (mTraversalScheduled);
+    }
+
+    private boolean mInLayout = false;
+    private final void performLayoutAndPlaceSurfacesLockedLoop() {
         if (mInLayout) {
             if (DEBUG) {
                 throw new RuntimeException("Recursive call!");