Fix errors in MockProvider unit tests

Change-Id: Ibfe6d72547f182332fddf82a842a131f920f5e7f
diff --git a/tests/src/com/android/exchange/provider/MockProvider.java b/tests/src/com/android/exchange/provider/MockProvider.java
index a7cac01..177ec55 100644
--- a/tests/src/com/android/exchange/provider/MockProvider.java
+++ b/tests/src/com/android/exchange/provider/MockProvider.java
@@ -74,6 +74,10 @@
         super(context, null, null, null);
     }
 
+    public MockProvider() {
+        super();
+    }
+
     // We'll store our values here
     private HashMap<String, ContentValues> mMockStore = new HashMap<String, ContentValues>();
     // And we'll generate new id's from here