* At present, we will cache empty cursors (i.e. where the query
result had zero rows)
* If a widget (or shortcut) references a deleted account, this will
create a cached entry for that account, and the defaultAccountId
code will try to retrieve the isDefault column from that (empty)
cursor
* To fix this, we simply skip over empty cursors when looking for
a default account
* We will also look into whether it makes sense to cache zero-
length cursors
Bug: 4883043
Change-Id: Id998506f77bd6cda6cb1f5d8ce65d689dde4d2c5
c09ca39cde