Fix inconsistent Toolbar background color

[gayatriii0803]

Purpose / Description

The toolbar background color should not be blue, it should be black in Black/Dark theme

Fixes

• Fixes [BUG]: Inconsistent Toolbar background color #17145

Approach

Fix inconsistent Toolbar background by replacing colorPrimary with appBarColor

How Has This Been Tested?

Checklist

Please, go through these checks before submitting the PR.

• You have a descriptive commit message with a short title (first line, max 50 chars).
• You have commented your code, particularly in hard-to-understand areas
• You have performed a self-review of your own code
• UI changes: include screenshots of all affected screens (in particular showing any new or changed strings)
• UI Changes: You have tested your change using the Google Accessibility Scanner

[rohit9625]

I think you should make top bar color blend with the content.