Auto-fill logging improvements:

- Shorten history line by removing less relevant items.
- Decrease number of history items (from 100 to 20).
- Removed redundant logs from service (and kept them on manager)
- Use {} on all log statements.
- Remove DEBUG guard on some important messages.
- Remove DEBUG guard from service-side toString() implementations.
- Don't log FLAG_FOCUS_LOST actions.

BUG: 33197203
Test: manual verification
Change-Id: I30466ab3c0d12cfa2ad68b2b2a107d5890256845