Grant visibility of voice interaction to the client app

There are three event in which a client app is started:
1. When Assistant starts Voice Activity (startVoiceActivity)
2. When Assistant requests for a Direct Actions (requestDirectActions)
3. When the app starts invoice interation session
   (startLocalVoiceInteraction)

Change-Id: I261ccc1a7136a601b5c8c8b766dc03a024cfe93d
Test: atest android.voiceinteraction.cts