Long press Lockscreen status bar expands the shade

Renamed LongPressGestureDetector to StatusBarLongPressGestureDetector
as well, because it looked ambiguous outside of the the shade package

Bug: 371224114
Test: Ran affected tests
Test: Manually verified with go/shade-cujs
Flag: com.android.systemui.shade_expands_on_status_bar_long_press
Change-Id: I7620dfcc1f55fe19d19e1d3e3107494eae0aff41