Create a new window to host car specific sysui

Currently we're using STATUS_BAR_SUB_PANEL windowing layer, but we'll
need to revisit this in the future.

Also the height is calculated by appending the height of the navigation
bar. We'll also need to discuss with the windowing team on how to get
the full height of the display using MATCH_PARENT.

Bug: 147455109
Test: manual (test that the window can hold content with a test screen)
Change-Id: I3b821ec0382515804a4ee80396f15d608467efdf