Add platform information for vell touchpad

Add the hwprops and props for vell's touchpad, as generated by
evemu-describe

BUG=b:241629080
TEST=manual

Change-Id: I383aa98c2cd498351644704d07cf067f2b57cdbb
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/mttools/+/3879266
Reviewed-by: Kenneth Albanowski <kenalba@google.com>
Tested-by: Sean O'Brien <seobrien@chromium.org>
Commit-Queue: Sean O'Brien <seobrien@chromium.org>
2 files changed