Sync focus stack frame and layer with focus app.

Update focus stack frame/layer when focus app is changed to avoid
focus stack/layer isn't updated synchronously with focus app, it's
due to performLayoutAndPlaceSurfacesLocked() is not necessarily
called on focus app change; it will cause sending mismatching 
TAP_OUTSIDE_STACK message if there is effectual incoming pointer
event, hence may also result in focus stack is changed again,
therefore erroneous focus app is set by ActivityManager at final.

Change-Id: Ia0ec9a543be887b51a3b29b3e62fdd471c15edf2
Signed-off-by: tingna_sung <tingna_sung@htc.com>

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

@@ -4000,6 +4000,15 @@ public class WindowManagerService extends IWindowManager.Stub
             if (changed) {
                 mFocusedApp = newFocus;
                 mInputMonitor.setFocusedAppLw(newFocus);
+                setFocusedStackFrame();
+                if (SHOW_LIGHT_TRANSACTIONS) Slog.i(TAG, ">>> OPEN TRANSACTION setFocusedApp");
+                SurfaceControl.openTransaction();
+                try {
+                    setFocusedStackLayer();
+                } finally {
+                    SurfaceControl.closeTransaction();
+                    if (SHOW_LIGHT_TRANSACTIONS) Slog.i(TAG, ">>> CLOSE TRANSACTION setFocusedApp");
+                }
             }
 
             if (moveFocusNow && changed) {