Properly check for orientation mismatch

Previous check tested against the display, which is wrong. Now
we properly check against the configuration.

Test: go/wm-smoke
Test: Enter split screen, go home, launch app, go home, relaunch
app, ensure no splash screen shown
Test: Enter split screen with 2 apps, lock phone, unlock phone

Change-Id: I62d45b6d3e5aa91dcb5edffed4233a5fed7ac9aa
Fixes: 63075521