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

If we have only one function to share, and the main purpose of this is to update some specific UI elements, it may be difficult to isolate this function and make it general enough to become a shared library. However, I support to reduce copy/paste in our code base. I just don't know how to do that in this case.