If useTouchpadNaturalScrolling is false, "Reverse scrolling" should be on.
[The API value]
useTouchpadNaturalScrolling: false
[The expected UX behavior]
Reverse scrolling: on
fingers upward, scroll up, content moves down
The description of "useTouchpadNaturalScrolling":
Returns true if moving two fingers upwards on the touchpad should scroll down, which is known as natural scrolling.
The description of "Reverse scrolling":
Content moves up when you scroll down.
Bug: 280047007
Test: manual and passed atest TrackpadReverseScrollingPreferenceControllerTest
Change-Id: Ia5e30fa14b599ddcffae99005114f10412ccad3c
0b79c92348