add reply.writeNoException() for quick response

In case of SET_ACTIVITY_CONTROLLER_TRANSACTION, there is no reply transaction.
So makes same to other transactions.

Change-Id: I3b9527682662a12f78cc96b6084904f18178fee7
diff --git a/core/java/android/app/ActivityManagerNative.java b/core/java/android/app/ActivityManagerNative.java
index 67d3930..bc7ac32 100644
--- a/core/java/android/app/ActivityManagerNative.java
+++ b/core/java/android/app/ActivityManagerNative.java
@@ -1147,6 +1147,7 @@
             IActivityController watcher = IActivityController.Stub.asInterface(
                     data.readStrongBinder());
             setActivityController(watcher);
+            reply.writeNoException();
             return true;
         }