[sb] Use BatteryCanvas composable in the battery chip

Adds a new battery composable event chip, and a new chip view that hosts
a single ComposeView so that we can reuse it in the future.

Test: manual
Bug: 391605373
Flag: com.android.settingslib.flags.new_status_bar_icons
Flag: com.android.systemui.status_bar_root_modernization
Change-Id: I7c5f8a3636f2464cdcf8b65c23b391de14e59275