[Expressive Battery] In Battery screen, split items into different category

- For experssive style, items split into 2 groups. Item "battery percentage" for a single group.
- For original style, reorder the items, sort item "battery percentage" at the last.

Bug: 349652542
Test: visual
Flag: com.android.settingslib.widget.theme.flags.is_expressive_design_enabled
Change-Id: I4a163d075ecd94a8079839dc0ad34dd993a7c725