audio-headset-symbolic revision

[D0J0P]

Problem

Making audio-headset-symbolic look the same as audio-headphones-symbolic.

Proposal

Since we're going to use different icons for outputs now, it'd be cool if audio-headset-symbolic looked just like audio-headphone-symbolic 48px(I mentioned it in #1057), but with the headset included of course, and a round mic instead of squared.

Prior Art (Optional)

No response