DE452288 - Added exception message for null pointers.

Author: abhisheknaidu-462

mas-foundation/src/main/java/com/ca/mas/core/storage/sharedstorage/AccountManagerUtil.java

@@ -61,7 +61,10 @@ public AccountManagerUtil(Context context, String accountName, boolean sharedSto
                         // - case migration from old AccountManagerStoreDataSource
                         mAccount = null;
                         identifier = new SharedStorageIdentifier();
+                        new NullPointerException("Password is null");
                     }
+                } else {
+                    new NullPointerException("Account Name does not exist");
                 }
             }