Hotword: Treat preflight soft denial as granted.

In preflight we should accept soft denials as they can become grants at
the time of delivery.
Realigns permissions code in VoiceInteraction with that in SoundTrigger,
which was fixed in I4fc3b3e8defed59a900fd156273e9e695a322b0c.

Fix: 194137739
Test: manual - no errors for starting recognition when mic access is
 blocked. data delivery is still blocked
Test: atest HotwordDetectionServiceBasicTest
Change-Id: I49d504a30b4d04f157990580838757a3f17861cc