D23161: Make media control icons outline style instead of solid style

[Nathaniel Graham]

ngraham added reviewers: VDG, ndavis.

REPOSITORY
  R266 Breeze Icons

REVISION DETAIL
  https://phabricator.kde.org/D23161

To: guoyunhe, #vdg, ndavis
Cc: kde-frameworks-devel, LeGast00n, michaelh, ngraham, bruns