Implement passing the model data to the trusted process

In this patch, we change the behavior to trigger the hotword
detection service when the interactor application calls the
new "createAlwaysOnHotwordDetector" function. The system will
also pass the read-only data(Ex : model data) back to hotword
detection service by using the share memory when the service
is initialized.

So the interactor application can use the new function with
share memory to pass the model data back to hotword detection
service.

Bug: 176938619
Test: atest CtsVoiceInteractionTestCases
Change-Id: I753988691725c9d962be25c92d60ec66a3812394