[Trackpad] Do not reverse two-finger gestures on the homescreen when reverse scrolling is on

- Swipe up to pull up all apps
- Swipe down to pull down notifications
- Same gesture to close in reverse scrolling mode

Bug: 301966246
Bug: 301966690
Test: manual
Change-Id: Ia3770ce8b279d24b2de4844f441f14e0feaf57c7