Add onSuggestedReplySent in NotificationAssistantService

This is added to report clicks on smart reply buttons to NAS.

Also refactored the code a bit by having SmartReplyView to use
SmartReplies and SmartActions object, rather than passing a long list
of arguments.

Test: atest SystemUITests
Test: Manual. Tapped on the reply and observed the log.
BUG: 111437455

Change-Id: I897fb46a304f4f7b80b2a6bc4db0ac39f6dc6e8f