Hamburger Bar Hidden

- [x] I am on the [latest](https://github.com/ActivityWatch/activitywatch/releases/latest) ActivityWatch version.
- [x] I have searched the issues of this repo and believe that this is not a duplicate.

- **OS name and version**: E/OS 1.21-t-20240326389105-dev-sunfish Android 13
- **ActivityWatch version**: Android v0.12.1 (rust)

## Describe the bug
In dark mode, the hamburger bar does not show up in the top right corner. It is there because whenever I click on it, it will perform its action as usual. However, the colors do not contrast properly and it is not visible.

## To Reproduce
Switch the android app to dark mode through the settings. Look at the hamburger bar in the top right corner. There you go.

## Expected behavior
No hamburger bar visible.