Move app transition constants

Move app transition constants from WindowManagerPolicy to
AppTransition.

Change-Id: I8ae6c4d0da1db826c44eb4ea0c6b85016b50b1a3
diff --git a/services/java/com/android/server/am/ActivityManagerService.java b/services/java/com/android/server/am/ActivityManagerService.java
index 1cd370a..62af91e 100644
--- a/services/java/com/android/server/am/ActivityManagerService.java
+++ b/services/java/com/android/server/am/ActivityManagerService.java
@@ -28,6 +28,7 @@
 import com.android.server.Watchdog;
 import com.android.server.am.ActivityStack.ActivityState;
 import com.android.server.pm.UserManagerService;
+import com.android.server.wm.AppTransition;
 import com.android.server.wm.WindowManagerService;
 
 import dalvik.system.Zygote;
@@ -130,7 +131,6 @@
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.WindowManager;
-import android.view.WindowManagerPolicy;
 
 import java.io.BufferedInputStream;
 import java.io.BufferedOutputStream;
@@ -1970,9 +1970,9 @@
     
     boolean isNextTransitionForward() {
         int transit = mWindowManager.getPendingAppTransition();
-        return transit == WindowManagerPolicy.TRANSIT_ACTIVITY_OPEN
-                || transit == WindowManagerPolicy.TRANSIT_TASK_OPEN
-                || transit == WindowManagerPolicy.TRANSIT_TASK_TO_FRONT;
+        return transit == AppTransition.TRANSIT_ACTIVITY_OPEN
+                || transit == AppTransition.TRANSIT_TASK_OPEN
+                || transit == AppTransition.TRANSIT_TASK_TO_FRONT;
     }
     
     final ProcessRecord startProcessLocked(String processName,