Make QS tests less likely to fail

Delays in the system are causing tile activation delay.
The test should still pass, given that functionality is not broken.

These performance regressions will still be caught on performance
tests.

Fixes: 150662589
Test: atest --test-mapping frameworks/base/packages/SystemUI:platinum-postsubmit
Change-Id: Ibd17e22c0ff1a26e41a4c62ce67fabff53a5ff87