[Expressive Battery] Migrate tips card in battery usage to banner message

- Update card preference: Update icon hint color by banner attention level
- Remove redundant color token: Use the existing Material yellow as a warning color

Bug: 349652542
Test: atest BatteryTipsControllerTest
Flag: com.android.settingslib.widget.theme.flags.is_expressive_design_enabled
Change-Id: I35730eb4716e9dbd712c22db63490e8bc06fc482