Add 22px notifications icons
Summary: Added because 16px version of these icons are currently used in the notifications widget where 22px icons should be used
Test Plan:
Reviewers: VDG, filipf, ngraham
Reviewed By: VDG, filipf, ngraham
Subscribers: ngraham, filipf, kde-frameworks-devel
Tags: Frameworks
Differential Revision: https://phabricator.kde.org/D21523