RM6785: power: Add better tracing for sendHint and refactor existing tracing

Reset traced hint value to -1 on reportActualWorkDuration or stale
timeout, and rewrite existing tracing for readability.

Bug: b/243973548
Test: manual
Change-Id: I135ec5f8971a9902d880e4089b0df746f5b917e2
2 files changed