Ensure instrumentationRunFinished callback is called

CoreTestRunner was not calling the final callback allowing
to print the run summary containing time. Correcting this
in a similar way as TestExecutor.

Test: manual
run cts-dev -m CtsLibcoreOjTestCases
Bug: 34647657

(cherry picked from commit a38e11101b060e308e7140529e17cfba8adf6ab5)

Change-Id: I77d767ab5244e38c1ee5ddc2ffc8a3b11524a847
1 file changed