Fix wake-and-unlock animation

Since okToDisplay was false when we started the keyguard exit
animation, no animation was applied and we didn't create a
starting window, which lead to flickering. We fix this by
allowing animations from mScreenOnEarly.

Furthermore, we synchronize the navigation bar better with the
rest of the animation.

We also need to apply no animation to the status bar window as
we go through performShowLocked because we were waiting for it
to draw.

Test: go/wm-smoke
Test: Wake-and-unlock
Test: Make sure no other regression with screen on experience
Change-Id: I5f264b74cc258e8d7f608978edfb1faa5ead385c
Fixes: 38441599