[Bug]: Battery widget uses incorrect background color

[ThatOneCalculator]

Bug Description

Most widgets use a specific surface color, which the new battery widget doesn't adhere to.

Steps to Reproduce

1. Add widget to home screen

Expected Behavior

Correct background color is used

Screenshots

No response

Android Version

Android 16

Device

Pixel 9

App Version

10.1

Additional Context

No response

[sameerasw]

Appreciate the PR, Will go through and merge! <3