Bug 1018283 - [Follow-up 951665] Pending visual revision and adjustments of the VR call screen when in lockscreen

Are your sure you need to change these default properties? I've designed these properties can be overwritten while you initialize it in your component, like System/js/lockscreen.js or the callscreen . Unless the properties really can't satisfied your needs, please don't change them, or at least make them customizable and customize them in your component.