[moblab] mobmonitor check for connected servo v4

The ServoExists check does not detect a connected servo v4. Add the
servo v4 USB PID to the check.

BUG=chromium:839912
TEST=test on local device. plug and unplug servo v4.

Change-Id: I726bc1f9f96780aff941c0d54f898acabf2e98b8
Reviewed-on: https://chromium-review.googlesource.com/1044775
Commit-Ready: Matt Mallett <mattmallett@chromium.org>
Tested-by: Matt Mallett <mattmallett@chromium.org>
Reviewed-by: Keith Haddow <haddowk@chromium.org>
1 file changed
tree: bb4d396947ce057824abe96030fa64c8e3d3fc00
  1. COMMIT-QUEUE.ini
  2. OWNERS
  3. PRESUBMIT.cfg
  4. partner_ui/
  5. pylintrc
  6. scripts/
  7. src/