Update advanced bt header

1. Add callback to listen to device update
2. Add charging support for bt battery icon
3. When disconnected, only show main icon

Follow CL will update battery icon to show exclamation when it is
low.

Bug: 124455912
Test: RunSettingsRoboTests
Change-Id: I03fb3bf4c4b77711e14b1f2f53733771b525fe4b