Summary:
The vector icons were rastizered for older Android versions, but these were on the small side. This fixes the size.

BUG: 392061

Test Plan: The icons aren't blurry anymore on Android 4.2.

Reviewers: #kde_connect, nicolasfella

Reviewed By: #kde_connect, nicolasfella

Subscribers: #kde_connect

Differential Revision: https://phabricator.kde.org/D11644