Improves the REMINDER_EXP mode for Assist Handle behavior

- User learning state is reset when leaving REMINDER_EXP behavior.
- Default parameters updated for easier testing and better experience
- Show and go only performed once per day when gesture has been learned
- Slightly delay handle showing when entering an apps with a longer
  delay when switching between apps rapidly.
- Adds state dump to improve debugability.
- Adds ability to suppress handle showing in specific states using
  flags.

Test: atest AssistHandleBehaviorControllerTest
Test: Tested locally
BUG:132983599
Change-Id: I7829ad55d7667f5db3633e702add709968dcd0a9