Ui changes in battery main page

1. Refine the battery header view
2. Move stats section to the place above power management
3. Add last full charge battery stat
4. Add the disclaimer as a footer

Also update the method name in test file, and this ui changes
also fix the header flash problem.

Bug: 36576021
Bug: 36494178
Test: RunSettingsRoboTests
Change-Id: I9784dbbbe16e61da7287f300183347dd4eee6a2b