Fix null pointer error && add settings side guard

The null check for the cursor happens in the try block
which causes a null pointer error in the finally block
even though we avoid executing the other code because
we still try to close the cursor. This change moves
that outside of the try block to avoid that. Also added
a test to verify that a no-op occurs in the method that
uses the enhanced prediction that would have caught this.

Additionally, the method for checking if the enhanced
prediction was available was not being called in Settings.
This CL adds that check and a relevant tests to ensure it
is respected.

Test: Robotests
Bug: 38031439
Change-Id: I6924acb5552baf09a9ff0cdef8e30881115aa1ca