STL rename enum values for disableSwipesWhenScrolling() modifier 1/2

For clarity, the enum values will be called TopOrLeft and BottomOrRight,
to indicate that one or the other will be used based on the scroll
 orientation.

disableSwipesWhenScrolling(NestedScrollableBound.TopOrLeft)
disableSwipesWhenScrolling(NestedScrollableBound.BottomOrRight)

Test: Manually tested on the Demo app
Bug: 416342077
Flag: com.android.systemui.scene_container
Change-Id: I91f4e51f7b1947810333a844cc6a8636c0436626