Changes:
- minHeight for BottomNavigationView is actually a minimum height, not an exact height; the bar height now wraps content properly
- For BottomNavigationView, bottom item padding now counts from the bottom of the label group instead of from the lowest label baseline. The label TextViews also have a min height of the line height supplied by the provided TextAppearance. This aligns with our m3 specs
- Structural changes in navigation item layouts. Previously the label and the icon were not aware of each other in a FrameLayout and could potentially overlap; this is no longer the case as they are in a LinearLayout
- padding between icon and label is 4dp as per specs
- Centering logic changed to center the icon and label as a group, not separately
PiperOrigin-RevId: 635922505
