Support creating docked stack at top/left/bottom/right half of screen

Change-Id: Id8d6f639ed67baadb856ce84a20af8929e04cb2e
diff --git a/core/java/android/app/ActivityManagerNative.java b/core/java/android/app/ActivityManagerNative.java
index d1c73bc..d79716c 100644
--- a/core/java/android/app/ActivityManagerNative.java
+++ b/core/java/android/app/ActivityManagerNative.java
@@ -743,6 +743,16 @@
             return true;
         }
 
+        case MOVE_TASK_TO_DOCKED_STACK_TRANSACTION: {
+            data.enforceInterface(IActivityManager.descriptor);
+            int taskId = data.readInt();
+            int createMode = data.readInt();
+            boolean toTop = data.readInt() != 0;
+            moveTaskToDockedStack(taskId, createMode, toTop);
+            reply.writeNoException();
+            return true;
+        }
+
         case RESIZE_STACK_TRANSACTION: {
             data.enforceInterface(IActivityManager.descriptor);
             int stackId = data.readInt();
@@ -3510,6 +3520,21 @@
         reply.recycle();
     }
     @Override
+    public void moveTaskToDockedStack(int taskId, int createMode, boolean toTop)
+            throws RemoteException
+    {
+        Parcel data = Parcel.obtain();
+        Parcel reply = Parcel.obtain();
+        data.writeInterfaceToken(IActivityManager.descriptor);
+        data.writeInt(taskId);
+        data.writeInt(createMode);
+        data.writeInt(toTop ? 1 : 0);
+        mRemote.transact(MOVE_TASK_TO_DOCKED_STACK_TRANSACTION, data, reply, 0);
+        reply.readException();
+        data.recycle();
+        reply.recycle();
+    }
+    @Override
     public void resizeStack(int stackId, Rect r) throws RemoteException
     {
         Parcel data = Parcel.obtain();