GitLab

Add an event converter to handle bluetooth stylus buttons.  Since we
only support one device so far, hard-code the key generated by
double-click.

Bug: b:139781900

Change-Id: I546845563b55f6001259cb198850e43a4e404156
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2079893
Commit-Queue: Sean O'Brien <seobrien@chromium.org>
Reviewed-by: Michael Spang <spang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#747449}