Create basic behavior of HotwordDetectionService

Create the HotwordDetectionService to help to verify the audio data.
The VoiceInteractor app will implement the HotwordDetectionService
and create the validation algorithm to increase the hotword accuracy.

The HotwordDetectionService will be triggered by VoiceInteractor app
from the VoiceInteractionService after the VoiceInteractionService
is ready.

The VoiceInteractionManagerService will check if we need to bind the
HotwordDetectionService.

After receiving the audio data from the DSP, the
VoiceInteractionManagerService will pass the audio data to the
HotwordDetectionService, then the HotwordDetectionService will verify
the audio data and send the result back.

If the hotword is valid, then the VoiceInteractionManagerService will
inform the VoiceInteractionService. The VoiceInteractor app will show
the UI.

Local test:
1.Make sure the original hotword function to work well manually.
2.Add the additional test code and check the log to make sure the
basic flow of hotword detection service runs well manually.

Bug: 175738546
Test: Manually
Test: atest CtsVoiceInteractionTestCases
Change-Id: Idb662bab37bb9691da24c9c2910a2c3dafedcadd