Close AlarmClock cursor, don't just deactivate it.

Bug: 3082936
Change-Id: I1e7ba769cc920bd2da2823afb2932dd352c5a15e
diff --git a/src/com/android/deskclock/AlarmClock.java b/src/com/android/deskclock/AlarmClock.java
index 5ecf5c4..c7d5ae8 100644
--- a/src/com/android/deskclock/AlarmClock.java
+++ b/src/com/android/deskclock/AlarmClock.java
@@ -248,7 +248,7 @@
     protected void onDestroy() {
         super.onDestroy();
         ToastMaster.cancelToast();
-        mCursor.deactivate();
+        mCursor.close();
     }
 
     @Override