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This traces input event and provide information that could be used to
match events on Android side.

TEST=Locally, confirmed that input events appear in ARC++ tracing tool.
BUG=b:132709527

Change-Id: Ice6e823f7be43db0e832253913c27a810dcca4cd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1625816
Commit-Queue: Yury Khmel <khmel@chromium.org>
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Cr-Commit-Position: refs/heads/master@{#664448}