Add some gesture logging to track down quickscrub launch issue

- Keep rudimentary log of the last few gestures for dumping with the BR
- Also renaming updateInteractionType since we only use it to change
  to the quickscrub starting interaction type now, which is less
  confusing

Bug: 112783625

Change-Id: Ic024684caf2841cd7c09df9481163ea0c0ae03bd