test case for Device constructor not tryStartPipeline()
test case for Device constructor not tryStartPipeline()

- catch bug and prevent regression as discussed
  https://github.com/luxonis/depthai-core/commit/7257b95ecfb8dcb77c075e196ac774cc05cb8bc6#commitcomment-71730879

luxonis/depthai-core,luxonis/depthai-core,luxonis/depthai-core