Icon change for playback speed and delay

Description

Change the icon style and size for playback speed and audio delay

Motivation and Context

The tap size was too small and the style was the old circled one

How Has This Been Tested?

Amulator 29

Screenshots / GIFs (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Enhancement (non-breaking change which cleans up / improves existing functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have read the CONTRIBUTING section of the README document.

Resolves

Fixes: #824 (closed)