Update bundle header in response to config changes

- Manually dispatch config changes to the bundle views
- Update dimensions in the correct order
- Simplify some height calculations for bundles
- Do less work - no manual recomposing and no leaking onattach lambas

Test: manual
- Dismiss a bundle
- Change the OS font size
- Post a new notification to the bundle so it reappears
and the text size will be correct
Test: manual - change between light and dark theme and view the bundle
Test: manual - change the display density and view the bundle header
Flag: com.android.systemui.notification_bundle_ui
Fixes: 429011494

Change-Id: I5f54797a3d0208202cb86f598a8f5238126cf4f7