use new icons from Breeze to indicate pauses and playing status

Summary: use new icons from Breeze to indicate pauses and playing status

Test Plan: the paused and playing status no longer looks like the play and pause buttons

Reviewers: astippich, januz

Reviewed By: astippich

Maniphest Tasks: T8330

Differential Revision: https://phabricator.kde.org/D13324