Revert "Android: convert touchpad two-finger swipe to mouse wheel."

This reverts commit 9e0c44245a1fdd0d6c0627ad1a0bb38b7252f971.

Reason for revert: this breaks momentum scrolling via trackpad. Details here: b/379977167
Original change's description:
> Android: convert touchpad two-finger swipe to mouse wheel.
>
> This is done if API level is 34+ and ConvertTrackpadEventsToMouse
> flag is enabled (currently enabled by default).
>
> Bug: 352413658, 379977167
> Change-Id: I87a1fa77445006430497d1db6259902af918a871
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5925872
> Reviewed-by: Jinsuk Kim <jinsukkim@chromium.org>
> Reviewed-by: David Trainor <dtrainor@chromium.org>
> Commit-Queue: Yuzhu Shen <yzshen@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1369699}

Bug: 352413658
Change-Id: I64f00f6e884abe7233722572fa9259dc23aca5b8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6108569
Commit-Queue: David Trainor <dtrainor@chromium.org>
Reviewed-by: Jinsuk Kim <jinsukkim@chromium.org>
Reviewed-by: David Trainor <dtrainor@chromium.org>
Auto-Submit: Eric Lok <lokeric@google.com>
Cr-Commit-Position: refs/heads/main@{#1401488}