[flexiglass] Verify that NSSL#mContentHeight is not accessed

NSSL#mContentHeight is replaced by ScrollViewFields#.intrinsicStackHeight when flexiglass is enabled.

Bug: 296118689
Fixes: 376018224
Test: run sysui with, and without flexiglass
Flag: EXEMPT mechanical refactor
Change-Id: I48f03b642c5061731434faae843a51ae1e954220
1 file changed