Fix failing desktopmode tests in -next targets

Adds missing flag that were assumed to be true because they're past
staging, but in -next targets they still need to be enabled by the
tests.

Flag: EXEMPT test fixes
Fix: 410584675
Fix: 411510355
Fix: 410585387
Fix: 411509120
Test: atest WMShellUnitTests
Change-Id: I07b49ce5010a455dfad2c2461918e311009f8178