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Remove the usage of device::HidDeviceInfo in tests.

Use device::mojom::HidDeviceInfo instead, make the device::HidDeviceInfo
internal of the //device/hid. So we can move the //device/hid into
//services in next step.

BUG=728223

Change-Id: I5d5cbd365f1debc7a963d54b9ccffc41fddda54a
Reviewed-on: https://chromium-review.googlesource.com/676946Reviewed-by: Colin Blundell <blundell@chromium.org>
Reviewed-by: Ken Rockot <rockot@chromium.org>
Commit-Queue: Ke He <ke.he@intel.com>
Cr-Commit-Position: refs/heads/master@{#504213}