Fix cursor window leak when query execution fails.

Ensure that the Cursor object is closed if a query on a
content provider fails due to an error or is canceled during
execution.  There are several places in the code where
similar problems can occur.

To further reduce the likelihood of leaks, close the cursor
window immediately when a query fails.

Bug: 7278577
Change-Id: I8c686c259de80a162b9086628a817d57f09fdd13