speech: TEST_MAPPING CtsVoiceRecognitionTestCases

ag/14530956 broke presubmit (b/188784537) because
CtsVoiceRecognitionTestCases did not run.

This makes them run for any change to core/java/android/speech

Bug: 188784537
Test: presubmitting this CL
Change-Id: I9e65abad8d242e5bb87fabc3523909bb14eed3c1