Suppress NSSL height updates when QS expand fraction is greater than 0

We used to suppress the NSSL height updates to make the UI stable when
expand QS panel in NSSL#updateStackEndHeightAndStackHeight, which gets
value from getQsExpansionFraction() before flexi-glass.

This change empowers the existing height update suppression flow to also
suppress the height updates when the QS is expanded at some fraction.

Bug: 433919013
Test: NotificationStackScrollLayoutTest
Flag: com.android.systemui.scene_container
Change-Id: I41e88c7a95bf89928a9ed4c4a86562f19604fc9b