Fix status bar visibility initialization

Make sure it starts up to everything showing and that the StatusBar
calculates the bar mades after it is attached.

There is still a bug where the behind scrim is showing during SUW,
but this fixes many of the issues besides that case.

Test: visual
Change-Id: I93314c607e374c97d5c06f936ef8b7e07e057648
Bug: 36407135