Correctly set the recognition state in response to GET_STATE

A forced recognition does not stop recognition.
SoundTriggerHelper had a bug where it assumed that it does, and so
future interactions would assume the wrong state and would eventually
erroneously use the underlying layers.

Bug: 147568295
Change-Id: I5ae69a8b292fda6aadc6011c4bf5cbc4d263a1ca