We notify VR Core when a 2D intent is running in VR in persistent mode.

One of the paths that sends these notifications incorrectly indicated
that a VR app was not running. Fix the callsite to include the current
VR component instead of null.

Bug: 38004624
Test: Launch VR app, verify null component is not sent to VR core
while it's running.

Change-Id: I0589ee51952a503bfddec214999ed5bce48715ba