Small step towards supporting multiple displays

Change-Id: I353449c2b464394988c7e0203656b5851a0c9127
diff --git a/services/java/com/android/server/wm/WindowAnimator.java b/services/java/com/android/server/wm/WindowAnimator.java
index 0b76fec..b0c858c 100644
--- a/services/java/com/android/server/wm/WindowAnimator.java
+++ b/services/java/com/android/server/wm/WindowAnimator.java
@@ -16,6 +16,7 @@
 import android.os.SystemClock;
 import android.util.Log;
 import android.util.Slog;
+import android.view.Display;
 import android.view.Surface;
 import android.view.WindowManagerPolicy;
 import android.view.animation.Animation;
@@ -121,8 +122,9 @@
             }
         };
 
-        mWindowAnimationBackgroundSurface = new DimSurface(mService.mFxSession);
-        mDimAnimator = new DimAnimator(mService.mFxSession);
+        mWindowAnimationBackgroundSurface =
+                new DimSurface(mService.mFxSession, Display.DEFAULT_DISPLAY);
+        mDimAnimator = new DimAnimator(mService.mFxSession, Display.DEFAULT_DISPLAY);
     }
 
     /** Locked on mAnimToLayout */