Make quick switch ("hook") more reliable

- Add max orthogonal displacement to MotionPauseDetector to avoid
  pausing when swiping left or right
- When gesture in ambiguous between swipe up for home or swipe over
  for the new task, base the decision on the faster velocity component
- Disable recents freescroll mode when dispatching motion from the nav
  bar. This way recents handles it naturally and we don't need custom
  logic to snap to the next page at the end of the gesture.
- Fix a bug where you couldn't hook to start a new task when SWIPE_HOME
  was disabled

Bug: 111926330
Change-Id: If63aa2bb32b57c3f401c5df8b3f6f4efec97b1fa