sound trigger: update HAL

New start_recognition() prototype with recognition
configuration structure specifying:
- List of keyphrases to listen to.
- Recognition mode for each keyphrase
- List of users and min confidence levels for each users

New recognition event format with confidence level and user ID
for each user.

Bug: 12378680.
Change-Id: I95e998c735321ceb5c27f477d894b574a6eca860
2 files changed