[Sample issue] menu-bar: does not support dark mode themes

[W3-Anjan]

Its a sample issue for getting habituated with contributors

Description

Dark mode themes work on most components, but not menu-bar.

Expected Behavior

The theme must work on all components

Actual Behavior

On android api level 8.0 this dark theme is not working

Possible Fix

Steps to Reproduce

Context

Your Environment

• App version used: 1.0.0
• Device Name and version: Samsung Galaxy S7 Edge
• Operating System and version: Android 8.0.0