Use new video camera icon

Summary:
A new video camera icons was added in D18986. Let's use it in Kamoso!

This requires bumping the frameworks dependency to 5.56, since that's the release
that includes the new camera icon.

Test Plan:

Reviewers: VDG, apol, filipf, rooty

Reviewed By: VDG, apol, filipf, rooty

Subscribers: filipf

Differential Revision: https://phabricator.kde.org/D19234