Making SysUiState's QS expansion flag require shade expansion

The comment for the flag suggests that this should have been in there
already. This is a possible fix for b/246273793 if there is a scenario
where the shade is collapsed but the QS expansion flag somehow
remained set to true.

Bug: 246273793
Test: ran atest and manually verified shade CUJs
Change-Id: I5867aae1ed2b1094e09d9abb7d6edc2e2a3714f8