clean-up following Surface split

Change-Id: I853a76d92d957ee38a36fcdd280d6407ec316987
diff --git a/services/java/com/android/server/wm/AppWindowToken.java b/services/java/com/android/server/wm/AppWindowToken.java
index 8fd5209..8cc1d02 100644
--- a/services/java/com/android/server/wm/AppWindowToken.java
+++ b/services/java/com/android/server/wm/AppWindowToken.java
@@ -157,7 +157,7 @@
                         + win.isDrawnLw()
                         + ", isAnimating=" + win.mWinAnimator.isAnimating());
                 if (!win.isDrawnLw()) {
-                    Slog.v(WindowManagerService.TAG, "Not displayed: s=" + win.mWinAnimator.mSurface
+                    Slog.v(WindowManagerService.TAG, "Not displayed: s=" + win.mWinAnimator.mSurfaceControl
                             + " pv=" + win.mPolicyVisibility
                             + " mDrawState=" + win.mWinAnimator.mDrawState
                             + " ah=" + win.mAttachedHidden