Fix emergency button overlap with nav bar

Fortunately this layout *censored* will go away very soon, but until
that's done, we still have to hack in this custom logic for every
window.

Layout notification shade exact same way as status bar.

Test: Set up PIN/Pattern/Password, try to unlock, click emergency
button
Fixes: 148041093

Change-Id: I8dda4fbaaa718016adc303e21c26a1b72f1e31b5