Add heatmapplot to touch_firmware_test

This patch add heatmapplot to touch_firmware_test. Heatmapplot is a tool
to plot heatmap. Currently the tool only support plotting bar chart of
profile sensor. The plotting script call heatmap_tool to dump the
heatmap from device. Heatmap_tool is a user space, board specific
device.

TEST=run heatmapplot locally
BUG=b:62343950

Change-Id: If8d5217e05b5dc8d79c149107b67f2f7e6f40cb8
Reviewed-on: https://chromium-review.googlesource.com/567687
Commit-Ready: Jingkui Wang <jkwang@google.com>
Tested-by: Jingkui Wang <jkwang@google.com>
Reviewed-by: Charlie Mooney <charliemooney@chromium.org>
12 files changed