Call SoundTrigger::setCaptureState in AudioPoilcyManager::closeAllInputs

closeAllInputs wasn't informing the sound trigger service that all
inputs were closed. This meant that the service could get stuck in a
state where it was disabled because it thought there was some active
capture, even though there was nothing listening. (This was particularly
common when a bluetooth device disconnected).

BUG: 26970013,26450651
Change-Id: I613434ecacce3ef03a657008fd94c314948ba2b8