Correct braces and add contributors

Summary: Braces to start a method are on a newline, braces to begin an in-method block are on the same line

Test Plan: Pure source code cosmetic changes. Hopefully no functionality has changed!

Reviewers: KDE Connect, nicolasfella

Reviewed By: KDE Connect, nicolasfella

Subscribers: apol, nicolasfella, kdeconnect

Tags: KDE Connect

Differential Revision: https://phabricator.kde.org/D15978